5.  当我们使用纸的两面时就会省下更多的钱。

More money will be saved when we use_______  _______ of paper.

4.  戴维一听到呼救声就跳进了水中。

David jumped into the water ______ _______ _______ he heard the cry for help.

3.窗子坏了，请查一下谁弄的。

The window is broken. Please_________ ____________ who did that.

2.   使我们惊奇的是，他独自去周游世界了。 

__________  __________  __________， he went to travel around the world alone.

1.   当我伸出手时，他却鞠了个躬。

He bowed when I__________ __________  my hand.

5.  Be careful! Don't___________   the same mistake this time. 

A. take       B. have   C. get           D. make

4.  In China_________ one's head means "No".

A. moving         B. shaking

C. nodding        D. raising

3.    Tom ________  to take part in the talk show on CCTV-3 the day before yesterday.

A. invites        B. invited

C. is invited      D. was invited

2.   I met him__________ the first time last year.

A. for       B. at

C. of        D. in

1.   ―You are supposed___________ before 7 o'clock.

—I'm sorry.

A. to arriving        B. to arrive

C. to get to          D. to reaching