A:                                ?

B:  Yes, they are. They can stop the wind and they can make the air fresh and clean.

A: We should plant more trees.

（1）Are the trees very important to people?

（2）we brought young trees.

（3）Did yogo to plant trees

（4）we used spades to dig holes

（5）got water from the river nearby.

【答案】（3）（4）（2）（5）（1）

【解析】

（1）由答句Yes, I did.可知应问一个一般疑问句，回答用did，问时也用did，故问Did yogo to plant trees？

（2）由问句How did yoplant trees?“你是怎样种树的？”可知要回答种树的过程，由first“首先”可知要说的是种树的第一步，即“用铁锹挖坑”，spade“铁锹”，hole“坑”，故填we used spades to dig holes。

（3）由下半句and put them into the holes.“把它们放进坑里”可知them“它们”指的是“小树苗”即young trees，brought，bring 的过去式，意为“拿来”，“拿来小树苗”，故填we brought young trees.

（4）由下一句We watered the young trees.“我们给小树浇水。”可知前一句应是“去河边打水.”故填got water from the river nearby.

（5）由下一句Yes, they are. They can stop the wind and they can make the air fresh and clean.“是的，它们能挡风和净化空气。”中Yes, they are.可知应问一个are  they开始的一般疑问句，即Are the trees very important to people?“这些树对人们很重要吗？”故选(1)。

19.按要求按成下列句子。

（1）这是一个忙碌的周末。

It was                           .

（2） 你周六早上做什么？

What did yodo                           .

（3）I；another； need；weekend；now.（连词成句）

（4） He did his homework and went fishing on Saturday morning.（写出它的一般疑问句）

（5）I cleaned my room on Sunday morning.（按划线部分提问）

【答案】

（1） a busy weekend

（2） on Saturday morning

（3） Now I need another weekend.

（4） Did he do his homework and go fishing on Saturday morning?

（5） What did yodo on Sunday morning?

【解析】

20.看图完成句子。

1. Here's ________ ________ of ________.

2. It is ________ of the ________ of my birthday.

3. My father ________ ________ to England tomorrow.

4. Mr Li ________ to ________ ________.

5. I want to go to Beijing ________ ________.

【答案】1. the flag；China 2. one；presents  3. will fly 4. wants；go swimming 5. by train