2 . We should protect the environment. We should not cut down the trees. (两句合一句)
We should protect the environment by ________ ________ down the trees.

3 . Paul regrets ______ the basketball game between Class 1 and Class2. They said it was so exciting.

A．to watch

B．watching

C．not to watch

D．not watching

4 . —Would you mind _________ the drums? The little baby is sleeping.
—Sorry, I’ll not do it here.

A．play

B．playing

C．not playing

5 . —Anna, would you mind ________ so much noise in class?
—Sorry, Mr. Brown. I won’t do that again.

A．to make

B．not to make

C．making

D．not making

6 . He apologized for ________ to attend the meeting on time.

A．his not being able	B．his being not able
C．not be able	D．that he’s not able

7 . 这句格言总是提醒我在深思熟虑前不要冒险。
This old saying always reminds me of ______ before thinking over and over again.

8 . Children can keep healthy ________ too much meat.

A．with not eating

B．not by eating

C．not with eating

D．by not eating

9 . We can save money ________ snacks.

A．by buying

B．by eating

C．by not buying

D．not by eating

10 . We can save water by ________ under a dripping tap.

A．brushing our teeth	B．brush our teeth
C．not brushing our teeth	D．not brush our teeth