Learning to write is learning to think. You don't know things clearly you can write them down.A.unless B.ifC.since D.whether 题目和参考答案——青夏教育精英家教网—

题目内容

Learning to write is learning to think. You don't know things clearly ______ you can write them down.

A.unless B.if

C.since D.whether

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What will the car be like in the future? Do we still have to learn to drive cars ourselves in the future? The answer is No.1..

About 40 years ago, scientists from the United States started to develop self-driving cars.2.. The most famous recent one was made by Google in 2009. There are cameras and radars on the top of the car. They allow the computer in the car to draw a 3D map of the environment.3.. The car made a trip from Changsha to Wuhan.

Is a self-driving car safe? 4.. If only 10% of the cars on the street are self-driving, they will save 1,000 lives every year. If 90% percent of vehicles are self-driving, 21,700 lives will be saved a year. 5.. So it is impossible to be very popular in the near future.

A. Chinese scientists have also successfully developed a self-driving car.

B. A recent study shows that robots make safer drivers than humans.

C. However, a self-driving car is expensive and each costs about $ 100, 000.

D. They have made great progress these years.

E. Maybe we can sit in a car that can drive itself.

—What fruit does your mother like?

—Let me ______ it. Oh, she likes apples.

A.help with B.think about C.ask for D.play with

Do you know why different animals or pests(昆虫) have their special colors? Their colors seem to be used mainly to protect themselves.

Some birds like eating locusts(蝗虫)，but birds cannot easily catch them. Why? It is because locusts change their colors together with the change of colors of crops. When crops are green，locusts look green. But as the harvest time comes，locusts change to the same brown colors as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.

If you study the animal life，you will find the main use of colors is to protect themselves. Bears，lions and other animals move quietly through forests. They cannot be easily seen by hunters. This is because they have the colors much like the trees.

Have you ever noticed an even stranger act? A kind of fish in the sea can send out a kind of very black liquid when they face danger. While the liquid spreads over(散开)，their enemies cannot find them. And they immediately swim away. So they have lived up to now though they are not strong at all.

1.From the passage，we learn that locusts ________．

A.change their colors to protect themselves

B.are dangerous to their enemies

C.are easily found by birds

D.are small animals

2.How can pests with different colors from plants keep out of danger?

A.They have the colors much like the enemies.

B.They hide themselves by day and appear at night.

C.They run away quickly.

D.They have to move quietly.

3.Bears and lions can keep safe because ________．

A.they live in forests

B.they have the colors much like the trees

C.they move quietly

D.they like brown and gray colors

4.Why can the fish mentioned(提到) in the last paragraph live up to now?

A.Because they are very big and strong.

B.Because the liquid they send out can help them escape from their enemies.

C.Because they swim faster than any other fish.

D.Because the liquid they send out can kill their enemies.

5.Which is the best title for this passage?

A.Colors of Different Animals and Pests

B.The Main Use of Colors for Animals and Pests

C.The Change of Colors for Animals and Pests

D.Some Animals and Pests

The boss often forces his workers ________for over eight hours.

A.work B.working

C.worked D.to work

Yesterday we did ________experiment in our chemistry class. It's interesting.

A.a B.an C.the D./

A.A B.B C.C

My name is Svetlana. I am from Ukraine. It’s a beautiful country. I enjoy sports.

One of the most popular sports in my country is football. I like playing football a lot. I often play football with my friends after school. We like to watch football games on TV on the weekend. There is a football club at our school. I’m in the football club.

I also like dancing very much. I think it is a wonderful sport. When I dance, I feel relaxed.

I started dancing six years ago. I’m in a dancing club in the center of our city. I go to the dancing club twice a week, on Wednesday and Saturday. I often get there by bus. I dance with a boy. His name is Dima. We usually do well in different dancing competitions (比赛).

I think dancing is good exercise for people of different ages. It can help us to keep healthy. Dancing is fun!

根据材料内容选择最佳答案。

1.How does Svetlana feel when she dances?

A.Bored. B.Tired C.Relaxed. D.Interested.

2.When does Svetlana go to the dancing club?

A.On Wednesday and Friday.

B.On Wednesday and Saturday.

C.On Friday and Sunday.

D.On Saturday and Sunday.

3.Why does Svetlana think dancing is good exercise?

A.Because it helps her to keep busy.

B.Because she can learn a lot from it.

C.Because it helps her to keep healthy.

D.Because she can have fun with Dima.

4.What clubs is Svetlana in?

A.The dancing club and the football club.

B.The basketball club and the football club.

C.The dancing club and the swimming club.

D.The basketball club and the swimming club.

5.Which of the following is TRUE according to the passage?

A.Svetlana comes from America.

B.Svetlana started dancing ten years ago.

C.Svetlana doesn’t do well in the dancing competitions.

D.In Svetlana’s country, football is a very popular sport.

—How is your friend coming?

—I’m not sure. He ________ drive here.

A.need B.can C.must D.may

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