In nature, you may see many insects 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(类似的) 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(土壤) insects are mostly dark-colored and they live under the soil 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 (墨鱼) in the sea can send out some very black ink when it faces danger. As the ink spreads over (散开) , its enemies(敌人) 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 (习惯) the environment easily.

Choose the best answer and complete the passage (选择最恰当的选项完成短文)

I went with some friends from my office for a dinner in a very popular local restaurant. It was regular business time and the restaurant was crowded. We ____________ found a table in a comer for three after waiting for an hour.

As soon as we sat down, we heard a loud noise when a young waiter hit the floor with all the plates he was carrying. There was _______________and no one was saying or doing anything.

In a flash, I remembered my experience many years ago, Once, I fell down on the ground in the airport because I had rushed to the airport on my own on an empty stomach. I was picked up and looked after by two ____________ This was my chance to pay it forward.

I ran to the young man's side. I turned him on his back and shouted for someone to bring a hot drink Soon people started asking if I was a doctor I said I was not, but I was skillful at blacking out(晕厥)。

The kid soon opened his eyes and started saying that he didn't know what had happened. I comforted him by saying it was OK and I had had a ___________ experience. He had not eaten, I held the warm drink to his mouth till he finished it and sat with him till he felt OK By then the_______________had arrived, I asked her to let the kid lie down for a little while until he was steady on his feet, and to give him something to cat, I offered to pay.

The lady was kind enough to refuse the payment and agreed to make sure the kid ate before he went home. By the time all this was over it was too late for my friends, We hadn't ordered anything yet, so we decided to go home.

I slowly walked home, not hungry any more, and my heart was thankful for the opportunity to pay forward the ______________ I had received many years ago.

1.A. actually B. finally C. carefully D. quickly

2.A. silence B. danger C. shout D. laugh

3.A. friends B. strangers C. relatives D. policemen

4.A. wonderful B. personal C. similar D. common

5.A. mother B. waitress C. manager D. ambulance

6.A. service B. wish C. education D. kindness

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