It （） three years since I joined the air force. 【be】 我加入空军已经三年了。

Mary （） ill for five days. 【be】 玛丽已经病了五天了。

There （） two maps in the room.【be】房间里有两张地图。

This question was （）difficult that no one could answer it.

A. too
B. very
C. so

Mary is not here. She （） to Paris.

A. went
B. has gone
C. has bee

Mary （） into the room.

A. burst
B. crashed
C. hit

The Europeans （）to stay ahead in aeroplane design.

A. failed
B. missed
C. lost

There is （） information on how to get the cheap fears.

A. few
B. afew
C. little

Can you （） what is wrong with the washing machine?

A. find out
B. find
C. look for

Tom （） his flight by twenty minutes.

A. missed
B. caught
C. took