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It was quite a serious mistake, _______ caused by carelessness.
A.which I think was B.I think which was
C.which I think it was D.I think which it was
九年级英语单选题中等难度题查看答案及解析
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It was quite a job for her to ____ several children all by herself during the war.
A. dress up B. bring up
C. tie up D. add up
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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Bad breath, or halitosis(口臭)， can be a serious problem.
Bad breath is caused by some germs(细菌) that grow in the month. When you don’t brush in a right way, germs will leave between your teeth and make your breath smell bad. Certain foods, especially ones like garlic and onions can cause bad breath. Smoking can also make bad breath.
Some people say that mouthwash(漱口水) will make bad breath go away, but it isn’t true. It only stops bad breath for a short time.
Some people also say that if you brush your teeth, you will not have bad breath. But the truth is that most people only brush their teeth for 30 to 45 seconds. It just doesn’t work. To clean all your teeth, you should brush for at least 2 minutes and at least twice a day. Remember to b rush your tongue, too—germs love to stay there.
If you do brush properly, but your bad breath still exists, visit your dentist for cleanings. You may have a medical problem like germ disease.
If you don’t want to have bad breath, make sure you’re taking care of your teeth and month well.
1.What can cause bad breath according to the passage?
A. Germs , certain food and smoking B. Germs, vegetables and drinking
C. Drinking, smoking and germs D. Teeth, germs and smoking
2.The underline word “ garlic” means in Chinese.
A. 蔬菜 B. 大蒜 C. 橄榄 D. 茄子
3.How long do most people brush their teeth according to the passage?
A. For 30 seconds. B. For 45 seconds.
C. For 30 to 45 seconds. D. For 2 minutes.
4.Which is the right way to brush your teeth?
A. To brush your teeth only in the morning.
B. To brush your teeth for at least 2 minutes and at least twice a day.
C. To brush your tongue twice a day.
D. To brush your teeth before and after meals.
5.Which of the following is true?
A. Mouthwash is the best thing to take away bad breath.
B. Bad breath may be a medical problem.
C. There aren’t any germs on your tongue.
D. You don’t need to go to the dentist if you have a bad breath.
九年级英语阅读理解中等难度题查看答案及解析
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— Maggie, what you said may result in serious problems.
— I see. I was just telling the truth.
A. cause
B. solve
C. become
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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Tom found it necessary to stop eating wild animals because it could cause a serious disease.（改写句子, 句意不变）
Tom found it necessary to ________ ________ eating wild animals because it could cause a serious disease.
九年级英语同义句转化中等难度题查看答案及解析
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The firemen put out the serious fire before any damage was caused, __________?
A.did they B.didn’t they C.was it D.wasn’t it
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 had made a serious mistake. Luckily you corrected it ________ it got worse.
A. when B. after C. until D. before
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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It is widely agreed that the over-use of fossil fuels, such as coal and oil has caused serious environmental problems. Scientists are trying to find new clean energies that do not pollute the air, the water or the ground. Solar power is one of them.
Solar power is a kind of electricity which is produced by taking energy from the sun, using solar panels (面板，电池板). The power is easy to get and will never be used up. Whenever it is sunny, there is the power. The power is clean and renewable. It helps to reduce waste and pollution, which is great for the environment. In the areas that are too far away to send electricity to or not easy to build electric power plants, solar power is especially necessary. It enables the people there to use lights, TVs, computers, washing machines, fridges and many other things.
Therefore, more and more countries, such as China, the USA, Japan and India, encourage scientists to develop practical technology to put solar power to use. However, the power is not as widely used as expected.
One of the challenges is that a solar power system needs sunshine. Countries or areas with a lot of rain, like the UK, are not suitable to develop such power system. Secondly, a solar power panels requires a very large site to fix enough solar panels to collect sunlight and change it into electricity. Maybe an area in the desert would be one of the perfect places for such a plant to build. What’s more, solar panels are expensive at present though the energy itself doesn’t cost anything.
Today scientists are working hard to develop more practical and cheaper solar power system. Maybe one day solar power will be one of the most important clean energies in our life.
1.Solar power is a kind of energy taken from .
A.the air B.the sun C.the water D.the ground
2.The underline phrase “be used up ”means .
A.短缺 B.滥用 C.用完 D.习惯
3.Why isn’t the solar power used widely?
A.Because a solar system needs sunshine. B.Because solar panels are expensive.
C.Because fixing solar panels needs very large sites. D.All over above.
4.What’s the main idea of paragraph 4?
A.The ways to use solar power
B.The advantages of solar power.
C.The places to build the solar power station.
D.The difficulties of putting solar power into use widely.
5.What can we learn from the passage?
A.Solar energy itself is expensive
B.Solar power will run out very soon.
C.Solar power is a kind of clean and useful energy.
D.Solar power is much better than the other energetic.
九年级英语阅读单选困难题查看答案及解析
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He made a serious mistake, but he took immediate action to change that ______ it got worse.
A. until B. when C. because D. before
九年级英语单项填空简单题查看答案及解析
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He made a serious mistake，but he took action to change that it got worse.
A. before B. when C. because D. until
九年级英语单项填空简单题查看答案及解析