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问题 选择题

蒸腾作用的场所是（　　）

A．根

B．茎

C．叶

D．花

答案

蒸腾作用是指植物体内的水分通过叶片的气孔以水蒸气的形式散发到大气中去的一个过程，可见叶片是蒸腾作用的主要部位．故C正确．

故选C

填空题

用 he, she, it, this, these, his, her, your, my 完成句子。

1. The boy  is Zhang Ming. ______ is my brother.

2. —Is ______ your mother?

    —No, ______ isn't.

3. ______  are my parents.

4. —Is the man your father? 

    —No. He is ______ uncle.

5. —Is ______ your friend?

    —Yes, he is. ______ name is Bob.

6. That is my sister. ______ name is Alice.

7. —What's ______ father's name?

    —My father's name is Jack Brown.

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选择题

The number of students in our school　　 about 30 000 and　　them study hard.

A．is;a large amount of

B．are;a number of

C．is;large amount of

D．is;a large number of
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