Now that the problem ________, appropriate ac...

Now that the problem ________, appropriate action can be taken, and final success will be seen.

A. is identified                        B. was identified

C. has been identified                    D. had been identified

高一英语单项填空中等难度题查看答案及解析

The scientists are now trying to discover what use can be ____such a material ____ the problem.

A.made out; to solve B.made up; solving

C.made of; to solve D.made from; solved

高一英语单项填空困难题查看答案及解析

Bad breath can be a major problem. The good news is that it can often be prevented with some simple steps.

Bad breath is caused by certain bacteria that grow in the mouth. When you don't brush regularly, bacteria accumulate in your mouth and between your teeth. 　　 1.　　 Certain foods, especially ones like garlic and onions that contain pungent (辛辣的）oils, can contribute to bad breath because the oils are carried to your lungs and out through your mouth. 　　 2.　　 Some people think that as long as you brush your teeth, you shouldn't have bad breath. 　　 3.　　　 That, however, just doesn't remove the smell. To sufficiently clean all the surfaces of your teeth, you should brush for at least 2 minutes at least twice a day.

Many people believe that if you breathe into your hand, you'll know when you have bad breath. But it’s wrong! 　　　 4.　　 When you talk, you tend to bring out the smell from the back of your mouth (where bad breath starts), which simply breathing doesn't do. Also, because we tend to get used to our own smells, it's hard for a person to tell if he or she has bad breath.

If you’re concerned about bad breath, make sure you’re taking care of your teeth and mouth properly. If you brush properly and visit your dentist for regular cleanings but your bad breath persists, you may have a medical problem. 　　 5.　　 They can figure out if something else is behind your bad breath and help you take care of it.

A. These bacteria make your breath smell.

B. In that case, call your doctor or dentist.

C. Smoking is also a major cause of bad breath.

D. Remember to brush your tongue, too — bacteria love to hang out there.

E. The truth is that most people only brush their teeth for 30 to 45 seconds.

F. When you breathe, the smell bounced back by your hand can be easily sensed.

G. When you breathe, you don^ use your throat the same way you do when you talk.

高一英语七选五中等难度题查看答案及解析

____ I admit the problems are difficult, I don’t agree that they can’t be solved.

A. Until                B. While        C. As           D. Unless

高一英语单项填空中等难度题查看答案及解析

can't wait to; be hard on; now that; mix up; insist on; in a mess

1.The teacher ________ his students and they are afraid of him.

2.Dad says he's bought me a new bicycle. I ________ go home and see it.

3.It's easy to forget or get ________ when you are applying for several jobs.

4.________ everyone is here, we can start the meeting.

5.As a reward for my efforts, the manager ________ giving me a raise though I have been in this company for only six months.

6.— Allen, your bedroom is ________．

— Sorry, Mum. I'll put away my things at once.

高一英语完成句子中等难度题查看答案及解析

Up to now, they _________ a good way to solve that problem.

高一英语单项填空中等难度题查看答案及解析

The program that _______ at last meeting remains to be discussed before being put into action.

高一英语单项填空中等难度题查看答案及解析

You don’t have to be a superhero to help the environment. Even small, simple actions can add up to big change. People around the world will celebrate Earth Day on April 22. But anyone – including kids – can work to help the earth at any time. TFK (Time for Kids) talked to a few kids about how they are protecting the planet. Let them inspire you!

Mari, 10, lives in Flint, Michigan, where people have been without clean drinking water since 2014. That is when the water became polluted with lead（铅）. Children in Flint have suffered from health problems due to lead poisoning. Mari has worked hard to spread awareness of Flint’s water crisis by organizing fundraisers and other events.

At age 3, Ryan went with his dad to recycling center near his home, in Orange County, California. The next day, Ryan began collecting recyclables from neighbors. Soon, Ryan’s Recycling Company was born. “Recycling keeps bottles and cans out of the ocean,” Ryan, now 8, told TFK, “so animals don’t get sick from them and die.” So far, Ryan has helped customers recycle 320,000 bottles and cans. He has also donated nearly $6,000 to the Pacific Marine Mammal Center.

Joris, 11, has always loved cheetahs. When he learned that the big cats might disappear in his lifetime, he set out to help protect them. Joris began raising money. So far, Joris has raised more than $14,000. The money goes to a wildlife sanctuary（避难所）in Namibia, a country in Africa. This helps prevent the animals from being killed. Jorin has spent three summers volunteering at the sanctuary.

1.What caused health problems for children in Flint?

A. Poor diets.　　 B. Lack of water.

C. Polluted water.　　 D. Poisonous gas.

2.How does Ryan help protect the earth?

A. By raising money.　　 B. By collecting recyclables.

C. By saving water.　　 D. By rescuing cheetahs.

3.Why did Joris raise money?

A. To feed cheetahs.　　 B. To help the poor.

C. To celebrate Earth Day.　　 D. To protect cheetahs.

4.What is the best title for the passage?

A. TFK Kid Reporters　　 B. Earth Day Celebrations

C. Kid Heroes for the Planet　　 D. Superheroes in the World

高一英语阅读理解中等难度题查看答案及解析

They ________that immediate action be taken to stop the water pollution .

A. requested 　　　　 B. expected

C. wished 　　　　　　 D. realized

高一英语单项填空中等难度题查看答案及解析

________I admit that there are problems, I don’t think that they can’t be solved.

A．While            B．When            C．As               D．For

高一英语单项填空简单题查看答案及解析