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—What do you want to be when you grow up, a doctor or an engineer?
—________. I want to be a scientist.
A.Neither B.Either C.Both D.None
九年级英语单选题中等难度题查看答案及解析
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You Are What You Eat
Genetic (基因的) engineering is the scientific change of the genetic material in a living thing. It allows scientists to identify specific genes, to remove them from a living thing’s chromosomes(染色体), improve them, analyze them, and possibly clone them, and to then reinsert the changed gene into the original living thing, or a completely different living things. Unlike traditional breeding (繁殖), where a desired quality would be bred within the same kind of living things, genetic engineering can insert desired ones into living things of different kinds. Wow ... did you catch that?
Genetic engineering creates many positive contributions to agriculture. For example, by genetically engineered (GE) foods, anti-cancer agents, minerals and vitamins can be increased. Improved taste, shelf life, and better transport are all possible. Also, GE plants can increase pest and bacterial resistance（抵抗力）, therefore, making the food safe for the consumers.
But some argue that the possible negative effects outweigh the positives, and critics are starting to voice their worries. Unlike Europe, in the United States labeling（贴标签）is not required on genetically engineered foods or on foods that contain genetically engineered products. Most Americans do not realize that they are, in fact, eating GE foods.
The public is also concerned about the unknown health risks. With limited understanding of genes, scientists cannot predict possible effects. Because most genes introduced into GE plants come from sources not introduced into the human body, it is impossible to know if they will cause reactions. Moreover, due to the lack of labeling, if allergies（过敏）develop, it will be extremely difficult to find the origin of them.
There is also a major moral question in many minds. For many, the conflict is not if it is safe or not, but it disturbs them because it is unnatural and unnecessary. We are currently producing one and a half times the amount of food needed to feed the world, yet one in seven people are starving. So GE food is unnecessary, and fails to address the root of hunger. Many believe that the only people who will benefit are the corporations that produce it.
Scientists cannot foresee the possible effects of GE foods, yet we eat them every day without even knowing it. We already have enough food, so why create more that could be potentially harmful to us, to the Earth and to all wildlife? I think that the benefits are amazing, but until we know for sure how these foods will affect us, they are not worth the risk.
1.According to the passage, traditional breeding is different from genetic engineering because________.
A.traditional breeding changes the genes in the same kind of living things
B.traditional breeding takes place within the same kind of living things
C.traditional breeding is more scientific
D.traditional breeding changes the genes in different kinds of living things
2.According to Paragraph 5, GE food is unnecessary because ________.
A.customers will benefit from GE food
B.we’re now producing more food than before
C.it won’t help solve the problem of hunger in the world
D.there are obvious dangers in producing GE food
3.What is the writer’s writing purpose?
A.To introduce genetic engineering’s positive contributions to agriculture.
B.To welcome genetic engineering and GE food.
C.To discuss the differences between GE food and other food.
D.To tell people to keep GE food off before their influence on us is clear.
九年级英语阅读单选困难题查看答案及解析
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Butterflies are some of the most beautiful insects in the world. However, what interests the scientists most is not their fascinating looks, but how they sense nature. They use their senses of sight, touch, hearing, smell and taste to find food, lay eggs in good places and avoid hungry enemies.
Butterflies have large compound(复合的) eyes. No matter where the things are, they can see them without turning their heads. 1. They are more possible to notice a sea of flowers than a single plant. Butterflies do not "see” colors. They are color blind. 2.The light on many flowers guides butterflies to honey.
How do butterflies smell? Butterflies have a very well-developed sense of smell, but it is not in their noses, since they don't have one. Sense organs (器官)are in their feet, and many other parts of the body.3.
Do butterflies use their mouths to taste the food they find? Not really. Butterflies' feet have sense organs that can taste the sugar in flower honey. They let the butterflies know if there is something delicious. 4.They feed their babies using a long tube(管道)，and they get all their food from this tube as well.
Butterflies don't have ears. Instead, they “hear" sounds through their wings by sensing changes in sound vibrations(震动).Butterflies' body is covered with sensory hairs. 5..For example, the hairs give butterflies information about the wind when they're flying. And where there is rain, the hairs can also tell butterflies.
The scientists say that butterflies may have senses we don't even know about yet, because their body is very different from ours. Therefore, it is difficult to understand when we use our own human senses to study it.
A. Like most insects, butterflies are very nearsighted.
B. They can let butterflies feel the environment around.
C. So it is not difficult for butterflies to find flower honey.
D. But they can sense sunlight, which tells them the direction.
E. They can help butterflies find their favorite flower honey food.
F. Some female butterflies taste the plants carefully to find places to lay eggs.
九年级英语补全短文6选5简单题查看答案及解析
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—Alice, do you know ________?
—I’m not sure. Maybe he is an engineer.
A.what the man with glasses is
B.what is the man with glasses
C.who the man with glasses is
九年级英语单选题中等难度题查看答案及解析
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Kids' Summer Jobs
Camp Counselor (辅导员)
We are looking for people to join us as a camp counselor at Cuya Outdoor School. We connect children to science through nature. Our camp counselors are energetic and supportive, and more importantly, caring team members. This is an eight-hour everyday job in the ten-day-long program during the summer.
Hours: 9:00 a.m. ～5:00 p.m.Pay: $10 per hour
LEGO Engineering Instructor
Do you enjoy taking things apart and then putting them back together? If so, then this may be your dream job! We are looking for smart and creative LEGO engineering instructors.
Hours: 2:00 p.m.～5:00 p.m. Pay: $15 per hour
Teacher's Aide (助手)
We are looking for part-time teacher's aides for our Inspire Kids Pre-school in Newburgh. Teacher's aides need to prepare materials, help children finish activities and create a safe environment.
Hours: 8:00 a.m.～11:00 a.m.Pay: $100 per week
Summer Care Giver
I'm looking for someone careful and patient to watch my kids when I'm working from 11:00 a. m. to 3:00 p.m. I have a 7-year-old daughter, and a 5-year-old son. I am also asking you to prepare snacks and clean up the rooms.
Pay: $150 per week
1.How much can a camp counselor make in total?
A.$10. B.$100. C.$150. D.$800.
2.To be a LEGO engineering instructor, one has to be ________.
A.caring B.creative C.energetic D.patient
3.What does a teacher's aide need to do?
A.Help children do activities. B.Teach children science.
C.Play LEGO with children. D.Prepare snacks for children.
4.What summer job can Jerry apply for if he is free from 10:00 a.m. to 4:00 p.m.?
A.Teacher's aide. B.Summer care giver. C.Camp counselor. D.LEGO engineering instructor.
5.Where can you probably find this text?
A.On a website. B.In a dictionary. C.In guide book. D.In a picture book.
九年级英语阅读单选困难题查看答案及解析
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As the world becomes increasingly populated, it is also becoming alarmingly polluted. Fortunately, there are many ways that you can help deal with the negative effects that we impose(施加) on the environment. One of these is driving an electric car.
Electric cars produce about 80 percent less pollution than cars with gas-powered motors. In fact, the only reason that electric cars produce any pollution at all is that their electric energy is produced by power plants — electric cars themselves produce no waste. When energy comes from large sources such as power plants, it’s easier to control, so there’s less waste than if the energy is produced by many smaller sources, such as the gas engines in individual cars.
Furthermore, electric cars are simply more efficient than gas-powered cars for several reasons. First, electric cars have regenerative braking, which means that when you use the brakes in an electric car, the battery has a chance to recharge(再充电). On the contrary, when you brake in a gas-powered car, you actually use energy. Also, during the production of electric cars, more time and energy is spent making the design lighter and more aerodynamic so that there will be less drag(阻力) from the wind. This allows them to travel farther using less energy than a gas-powered car would use to go the same distance.
In addition to the environmental benefits of driving electric cars, there are also financial and time-saving benefits for the drivers. For one, they cost less to maintain(维修). The cost of charging an electric car is about 20 percent of the cost of gas, and electric cars require far less maintenance than gas-powered cars. This is due, in part, to the fact that electric cars have no cooling system, fan belts, radiators, hoses, or oil — just a battery. There are fewer moving parts overall, so there are fewer possible problems. Also, after the body of an electric car gives out, the engine can be reused in another body. Electric cars can also save people time. While gas-powered cars require visits to a mechanic every few months, the only routine maintenance required by electric cars is replacing the battery every four years.
Overall, there are numerous benefits of driving an electric car. It may take a little getting used to, but in the long run, the use of electric cars can help preserve the environment and give people more time and money to be put to better use.
1.What can we learn from the second paragraph?
A.Less than 80 percent pollution is produced by cars.
B.Gas-powered cars get energy from power stations.
C.Electric cars themselves don’t produce any waste.
D.It’s difficult to control energy from power plants.
2.According to the passage, which of the following is TRUE?
A.The battery can be reused after the body of an electric car gives out.
B.Replacing the engine every four years is required for an electric car.
C.It may take no time to see the popularity of driving electric cars.
D.Electric cars cost less to maintain because of fewer moving parts.
3.What is the writer’s purpose of writing this passage?
A.To compare two kinds of cars.
B.To show a new way of driving.
C.To suggest driving electric cars.
D.To introduce a useful invention.
4.Which is the best title of the passage?
A.The Best Way to Protect the Environment
B.Electric Cars Are Worthy of a Second Look
C.The Greatest Invention in the New Century
D.Driving Electric Cars Saves Time and Money
九年级英语阅读单选中等难度题查看答案及解析
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判断正误 阅读下面的材料，判断下列句子是否符合短文内容。符合的填涂“T”，不符合的填涂“F”。（T=True，F=False）
More and more people are using mobile phones now. Smart phones are used as televisions, cameras, and music players. They are also used for sending e-mails or surfing the Internet. If someone talks about mobile phones, many Chinese will think of Huawei.
In China, even in the world, Huawei is a wonder (奇迹). Ren Zhengfei built up (创建) Huawei company in 1987. The company sold 58.4 million smart phones in the first season of 2019. Huawei has got the second place at the mobile market.
Now, Huawei has been the leader in 5G field. It has more than 75,000 top engineers and scientists on research. They try their best to bring digital (数码) and high technology to every person and place. It's more convenient for modern people to live in a rapid way. What a useful technology 5G is!
We are looking forward to seeing a stronger Huawei. It provides a faster and better communication way for us. It also brings “Created in China” to the world.
1.You can use Huawei mobile phones to take photos.
2.Ren Zhengfei set up Huawei company in 1987.
3.Huawei has got the first place at the mobile market.
4.Few top engineers and scientists work on research in Huawei company.
5.Huawei gives us a slower communication way.
九年级英语阅读判断中等难度题查看答案及解析
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—Allen, please tell me what you are going to be when you grow up.
—To be______ engineer just like you.
A. a B. an C. the D. 不填
九年级英语单项填空中等难度题查看答案及解析
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No matter who you are and where you live, the most important thing is what kind of person you are. There are many good qualities that can benefit you a lot in your life. Among them, the following _______ qualities are the most helpful ones.
Have a _______ attitude. Life is not always a bed of roses. When facing difficulties, don’t lose heart. Do you know what can help you overcome difficulties? It’s your altitude. Cheer up! Life is like a _______. When you smile in front of it, it will also smile at you.
Keep learning. Maybe you _______ your present life. Every day you have _______ much work to do that you can’t find any time to learn. However, the world around you is changing all the time. Never be satisfied with yourself, _______ you will fall behind others. _______ learning can help you get success in the future.
Be creative. In modern society, the students who have creative thinking are needed most. Being creative means_______ new ideas and having creative imagination. Those who are creative have more choices in their life.
Be honest and keep your promise. Honesty is the best policy(原则). _______ likes a person who tells lies. The one who keeps his word is popular everywhere.
As long as you have these qualities ________ above, you will be excellent and make a difference to the world. Albert Einstein once said, “Try not to become a man of success but rather try to become a man of value.’
根据短文内容选择最佳答案。
1.A. three B. four C. five
2.A. negative B. positive C. sad
3.A. board B. stone C. mirror
4.A. are used to B. are used for C. used for
5.A. too B. so C. such
6.A. and B. but C. or
7.A. Keep B. Keeping C. Keeps
8.A. coming up with B. catching up with C. calling up
9.A. Everybody B. Nobody C. Somebody
10.A. that is mentioned B. mentioning C. mentioned
九年级英语完型填空困难题查看答案及解析
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No matter who you are and where you live, the most important thing is what kind of person you are. There are many good qualities that can benefit you a lot in your life. Among them, the following four qualities(品质) are the most _______ ones.
Have a(n) _______ attitude(态度). Life is not always a bed of roses. When facing difficulties, don't lose heart. Do you know what can help you overcome difficulties? It's your attitude. Cheer up! Life is like a _______. When you smile in front of it, it will also smile at you.
Keep learning. Maybe you are used to your present life. Every day you have so much work to do that you _______ find any time to learn. However, the world around you is _______ all the time. Never be satisfied with yourself, _______ you will fall behind others. Keep learning can help you get _______ in the future.
Be creative. In modern society, the students who have _______ thinking are needed most. Being creative means coming up with new ideas and having creative imagination. Those who are creative have more choices in their life.
Be honest and keep your promise. Honesty is the best policy(原则). _______ likes a person who tells lies. The one who keeps his word is popular everywhere.
________ you have these qualities mentioned above, you will be excellent and make a difference to the world. Albert Einstein once said, “Try not to become a man of success but rather try to become a man of value.”
1.A.helpful B.wonderful C.thankful D.beautiful
2.A.angry B.active C.sad D.friendly
3.A.board B.stone C.mirror D.door
4.A.can't B.needn't C.mustn't D.shouldn't
5.A.practicing B.sleeping C.beginning D.changing
6.A.and B.but C.or D.so
7.A.money B.success C.health D.wealth
8.A.common B.clear C.lever D.creative
9.A.Anybody B.Nobody C.Somebody D.Everybody
10.A.As soon as B.So far C.As for D.As long as
九年级英语完型填空中等难度题查看答案及解析