1 . ________ a phone is of great help, I don’t think it’s a good idea to spend too much time on it.

A．If

B．While

C．Because

D．As

2 . She brought with her three friends，none of ________ I had ever met before.

A．them

B．who

C．whom

D．these

3 . Not until the motorbike looked almost new ________ repairing and cleaning it.

A．he stopped	B．did he stop
C．stopped he	D．he did stop

4 . Don’t promise anything ______ you are one hundred percent sure.

A．whether

B．after

C．how

D．unless

5 . Later in this chapter cases will be introduced to readers __ consumer complaints have resulted in changes in the law.

A．where	B．when
C．who	D．which

6 . It was announced that only when the fire was under control __________to return to their homes.

A．the residents would be permitted

B．had the residents been permitted

C．would the residents be permitted

D．the residents had been permitted

7 . Occasions are quite rare ____ I have the time to spend a day with my kids.

A．who

B．which

C．why

D．when

8 . We went through a period ________ communications were very difficult in the rural areas.

A．which

B．whose

C．in which

D．with which

9 . Chan's restaurant on Baker Street,___________used to be poorly run, is now a successful business.

A．that	B．which
C．who	D．where

10 . Many of them turned a deaf ear to his advice, ________ they knew it to be valuable.

A．as if

B．now that

C．even though

D．so that