Question

 

    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

Answer 1

26. A  由 “ You see,in a plant’s stem there are several hundred ‘water pipes’ ...”可知，“水管道”在植物的蓮里。

27. B  由“ When the ground turns dry,it becomes harder and harder for plants to do this. ” 可知，當(dāng)天氣干旱時，對于植物來說，得到水分越來越難。

28. D  由‘‘".when plants can get no water,their “water pipes” snap. ”可知，植物得不到水分時，它們的“水管道”會發(fā)出聲音。

29. C  由“When.that happens,the whole plant vibrates a little." 可知，當(dāng)“水管道”發(fā)出聲音時，整個植物會有一點顫動。

30. B  由句子“He also knows that dry plants are many insects’favorites and they often attack them." 可知，昆蟲襲擊干旱的植物。