In nature, you may see many insects (昆虫)and animals of different colors. Have you ever wondered why?

Locusts are super delicious food for birds,but it is not always an easy job for birds to catch them.It is neither because locusts are good jumpers or runners nor because they are smarter than their enemies. The reason is that the colors of locusts change with the colors of crops(庄稼). When crops are young,locusts look green. But when autumn comes, locusts change to the yellow and brown color as crops do.

Brown bears,tigers and other animals move quietly through forests. They can’t be seen easily by their enemies. This is because they have colors similar to the trees. For the same reason, polar bears that live on a land of snow and ice are white. Butterflies and bees living among the flowers are colorful like flowers. Soil insects are mostly dark-colored and they live under the soil(土壤) in a dark and wet environment. However, insects with colors different from plants can easily be found and eaten by others. So in order to survive,they have to hide themselves in the daytime and appear only at night.

Have you ever noticed some even stranger acts? The ink fish in the sea can send out some very black ink when it faces danger. As the ink spreads over , its enemies will find themselves suddenly in a dark world. At the same time the ink fish immediately swims away. That is how it keeps itself safe though it is not strong at all.

1.It is not easy for birds to catch locusts because____________.

A.locusts are good runners

B. locusts can jump very high

C. locusts are smarter than birds

D. locusts can change their color

2.According to the passage, most soil insects_________

A.do not have bright colors

B. change their colors with the soil

C. do not live in a dark and wet environment

D. Eat colorful insects like butterflies and bees

3.What’s the meaning of the underlined word”survive” in the passage

A. 繁殖 B. 产卵 C. 觅食 D. 生存

4.The ink fish_______so that its enemies will not see it

A. changes its color B. makes the water around it black

C. appears only at night D. hides itself in the sea rocks

5. What is the main ides of this passage

A. Some insects and animals have different skills.

B. Some insects and animals are clever than we think.

C. Some insects and animals use colors to protect themselves.

D. Some insects and animals can get used to the environment easily.

Jack is a twenty-year-old young man. Two years ago, when he finished middle school, he found work in a shop. Usually he works until ten o'clock in the evening. He is very tired when he gets home. After a quick supper he goes to bed and soon falls asleep. His grandma who lives downstairs is pleased with him.

One day, on his way home, he met his friend Mary. They were both happy. He asked the girl to his house, and she agreed happily. He bought some fruit and drinks for her. And they talked about their school, teachers, classmates and their future. They talked for a long time.

"Have a look at your watch, please," said the girl. "What time is it now?"

"Sorry, something is wrong with my watch," said Jack. "Where's yours?"

"I left it at home."

Jack thought for a moment and found a way. He began to stamp his foot on the floor, "Bang! Bang! Bang!"

The sound woke his grandma up. The old woman shouted downstairs, "It's twelve o'clock in the night, Jack. Why are you still jumping upstairs?"

1.Jack was ________ when he finished middle school.

A. sixteen B. eighteen C. twenty D. fifteen

2.The old woman is pleased with Jack because ________.

A. he's her grandson B. he's clever

C. he can keep quiet D. he gets home on time

3.From the story, we can know that Mary is Jack's ________.

A. classmate B. colleague (同事)

C. aunt D. wife

4.Jack stamped his foot on the floor in order to (为了) ________.

A. wake his grandma up

B. make his grandma angry

C. let his grandma tell him the time

D. let his grandma buy him a watch

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