When ________ in Arctic regions, the Aleuts construct igloos as temporary winter shelters．

A．travel

B．to travel

C．they traveling

D．traveling

________, Alexander Graham Bell was still a young man．

A．He invented the telephone

B．The telephone was invented

C．His invention of the telephone

D．When he invented the telephone

E-mail, as well as telephones, ________ an important part in daily communication．

A．is playing

B．have played

C．are playing

D．play

Shakespeare is well-known ________ a great writer ________ his excellent plays．

A．as; for

B．for; as

C．to; for

D．for; to

－You didn’t wait for Mr．Black last night, did you?

－No, but we ________．He didn’t return home at all．

A．couldn’t have

B．needn’t have

C．didn’t need to

D．should have

It’s six weeks ________ I met you last time．

A．when

B．since

C．before

D．for

Was it in the cinema ________ Mr．Smith met you ________ you saw the film?

A．where; that

B．that; that

C．where; which

D．which; that

It was in the room ________ he had lived ________ the meeting was held．

A．which; that

B．that; where

C．that; that

D．where; that

It was Mr．Smith ________ was an American ________ was invited．

A．who; that

B．who; where

C．that; where

D．that; what

He said his house needed ________．

A．mending

B．mended

C．to mend

D．to being mended