1 . Almost every teenager will experience a period in their life _____ they aren’t content with their parents．

A．when

B．where

C．that

D．which

2 . _________ caused the accident is still a mystery.

A．How

B．What

C．That

D．Where

3 . Mr. Duncan raised an unnecessary question __________ he then failed to find an answer.

A．to which

B．for which

C．with which

D．by which

4 . Is it He Long Sports Centre       you are going to watch the football match?

A．where

B．that

C．which

D．when

5 . —We’ll take the conditions into careful consideration ______ you have attached to this contract.
—Thanks. Hope for further cooperation.

A．as

B．which

C．where

D．what

6 . Fortunately we had a compass, without________we would have got lost.

A．which

B．it

C．that

D．what

7 . Between the two periods of classes is a break, _______ we can have a short rest.

A．then

B．where

C．when

D．which

8 . --How do you think I can make up with Tom?
--Put aside ________ you disagree and try to find ________ you have in common.

A．what; what	B．where; what
C．what; where	D．what; whether

9 . ______ you eat the correct foods ______ be able to keep fit and stay healthy.

A．Only if; will you	B．Only if; you will
C．Unless; will you	D．Unless; you will

10 . Many people can’t learn any lessons from the mistakes they’ve made __________ they get hurt somehow.

A．whether

B．unless

C．if

D．as