1 . We went through a period ______ communications were very difficult in the rural areas.

A．which

B．whose

C．when

D．where

2 . The Science Museum ______ we visited during a recent trip to Britain, is one of London’s famous tourist attractions.

A．which

B．what

C．who

D．whose

3 . It’s the first time that he has been to Australia, ______?

A．isn’t he

B．isn’t it

C．hasn’t he

D．hasn’t it

4 . Unless _________ to speak, you should remain silent at the conference, or you will be expelled.

A．inviting	B．having been invited
C．to invite	D．invited

5 . ______is widely acknowledged that computers have become a vital part of our society.

A．As

B．It

C．What

D．Which

6 .      Martin Luther King said in his speech made a deep impression_        both the black and the white.

A．That; on

B．That; in

C．What; in

D．What; on

7 . We’ll have to finish the job, ________.

A．whatever long it takes	B．long however it takes
C．it takes whatever long	D．however long it takes

8 . It remains to be seen __________ the traffic regulations will adapt to the actual situation after they are released.

A．whether

B．which

C．that

D．what

9 . A lot of language learning, ______ has been discovered, is happening in the first year of life, so parents should talk much to their children during that period.

A．as

B．it

C．that

D．this