( ) 3. We often use ______ to clean things.
A. coal
B. oil
C. water

C

( ) 4. There ______ some paper on the desk.
A. has
B. is
C. are

B

( ) 5. People cut down ____________ trees every day.
A. lot of
B. many
C. much

B

四、从Ⅱ栏中找出与Ⅰ栏相对应的句子，将序号填在题前的括号里。
Ⅰ
Ⅱ
（ ）1. Why can't people drive so much?
A. We can make toys.
（ ）2. What can you do?
B. Yes, I do.
（ ）3. Is coal useful?
C. I can water flowers.
（ ）4. Do you drink water every day?
D. Yes, it is.
（ ）5. How can we reuse the plastic?
E. Because cars use much energy.

E ; C ; D ; B ; A

五、按要求改写句子。
1. We shouldn't waste water.（改为同义句）
We should ______ water.
2. There is much oil on Earth.（改为否定句）
There ______ ______ much oil on Earth.
3. Wood comes from trees.（改为一般疑问句）
______ wood ______ from trees?
4. People should save energy because there's not much energy.（对画线部分提问）
______ ______ people ______ energy?
5. We can reuse a plastic bottle to make a toy.（对画线部分提问）
______ ______ you reuse to make a toy?

save
; is
; not
; Does
; come
; Why
; should
; save
; What
; can

六、看图完成句子。
1.
Smoke from cars ______ the air dirty.
Cars ______ a lot of energy.
We ______ drive so much.
2.
We use plastic ______ ______ bags and bottles.
But too much plastic is bad ______ the Earth.
We ______ reuse these plastic bags and bottles.

makes
; use
; shouldn't
; to
; make
; for
; should