36. In a forest,people can have more       (氧氣) to breathe.

37. Let’s       (討論) the importance of trees.

   Can trees talk? Yes,but not in words. Scientists have reasons to believe that trees can communicate with each other. Not long ago,researchers learned some surprising things. Some caterpillars (毛毛蟲) attacked a willow tree (柳樹) in the woods. The tree changed the chemistry of its leaves and the leaves tasted so terrible that the caterpillars stopped eating them. The even more surprising thing is that the tree sent out a special vapour (蒸氣) 一a signal causing its neighbors to change the chemistry of their own leaves and make them less tasty.

    Communication,of course,doesn’t need to be always in words. We can talk to each other by smiling,raising our shoulders and moving our hands. We know that birds and animals use a whole vocabulary of songs,sounds,and movements. Bees dance their signals,flying in certain patterns that tell other bees where to find nectar (花蜜) for honey. So why shouldn’t trees have ways of sending messages?

31. From the passage we know that caterpillars       .

    A .like willow tree’s leaves

   B. enjoy eating fallen leaves

   C. can talk to other caterpillars

   D. can send out a special vapour

32. Caterpillars will stop eating willow tree’s leaves which       .

   A. have a chemical change and become tasteless

   B. have a pleasant taste

   C. are being attacked

   D. are communicating

33. What makes the writer more surprised is that       .

   A. caterpillars slop eating willow tree’s leaves

   B. the willow tree can send out a special vapour

   C. trees can talk to each other by their words

    D. birds and animals all use vocabularies

34. According to the passage,bees communicate with each other by       .

   A. talking   B. making unusual sounds

   C. flying certain patterns   D. singing songs

35. Which of the following is WRONG according to the passage?

   A. Scientists believe that trees can talk with each other.

   B. The special vapour sent out by a willow tree is a signal.

   C. Trees should have their own ways to send messages.

   D. The writer thinks everything must use words to communicate.

    We all cry for water when we are thirsty. But do you know,in very hot,dry weather,plants also make very low sounds as if they are crying for help?

    You see,in a plants stem there are several hundred “water pipes”that bring water from soil all the way up to the leaves. When the ground turns dry,it becomes harder and harder for plants to do this.

    In very hot days,plants have to get any water that they can get.

    Scientists Robot Winter has found out that when plants can get no water,their “ water pipes ” snap (發(fā)出聲音) . When that happens,the whole plant vibrates (顏動) a little.

    Robot knows that healthy,wellwatered plants are quiet. He also knows that dry plants are many insects’ favorites and they often attack (襲擊) them. How do the insects know which are healthy plants and which are not? Robot thinks that the insects may hear the plants “crying” and they may come to kill them.

26. There are many “water pipes”       .

   A. in a plant’s stem   B. in a plant’s root

   C. in the sunshine   D. in the soil

27. It       for plants to get water when the ground turns dry.

   A. is easy   B. is difficult

   C. takes little time   D. is not necessary

28. When plants can      ,their “water pipes” snap.

   A. grow well   B. get no sunlight

   C. have enough water   D. get no water

29. When“water pipes”snap,the whole plant       .

   A. keeps quiet   B. gets well

   C. vibrates a little   D. makes very loud sounds

30. Many insects like to attack      .

   A. quiet plants   B. dry plants

   C. healthy plants   D. wellwatered plants

    Once there lived a farmer called Henry. He had a brother,Mike,in town who was an excellent gardener. His skill and his beautiful trees were 16  everywhere.

    One day,Henry went to town to visit Mike. “ Look,my brother，”said Mike ,“ Here is the best 17  tree from my garden.Take it home and 18  it so that you,your children,and your children’s children can enjoy it."Henry was 19 with the apple tree and went back home. The next morning,he began to 20 where he should plant it.

    “If I plant it on the hill,the wind might catch it and 21 down the fruit. If I plant it close to the road,people who pass by will pick some of them. But if I plant it...”said he to himself.

     22 he planted the tree in the corner behind his house,where no one else could notice it. But the tree bore (結出) no fruit the first year,nor the second. Then Henry sent for his brother and said to him 23 ,“ You have cheated me. This is the third year and it brings me 24  but leaves.”

    When Mike saw where the tree was planted,he laughed and said/4 You have planted the tree in such a cold corner without 25 or warmth. How,then,could you expect flowers and fruits?”

16. A. simple   B. famous   C. similar   D. common

17. A. pear   B. grape   C. apple   D. banana

18. A. sell   B. wash   C. hide   D. plant

19. A. tired   B. patient   C. pleased   D. popular

20. A. learn   B. wonder   C. realize   D. understand 

21 .A. put   B. cut   C. push   D. shake

22. A. Finally   B. Firstly   C. Luckily   D. Certainly

23. A. happily   B. angrily   C. kindly   D. carelessly

24. A. nothing   B. something   C. everything   D. anything

25. A. air   B. earth   C. water   D. sunlight

15. A number of volunteers from faraway cities.

   A. is   B. are   C. is come   D. are come

14. —If you prefer the red evening dress,you’ll have to pay 30       dollars,because it’s made of silk.

—OK. Here you are.

   A. other   B. the other

   C. more   D. another

13. Look!The passenger in front of you       games with his HTC One M8.

   A. is playing   B. are playing   C. were playing 

12. Someone       at the door. Can you open it?

   A. knocks   B. knocked

   C. is knocking   D. was knocking

11.The funny story made the kids       .

   A. to drink   B. to work   C. laugh   D. to cry

10. Try your best       with your parents and they will understand your decision.

   A. to talk   B. talk

   C. to play   D. play