The important task will take Peter and me about four months to complete, so it will be a long time _____ we meet you again.
A.after | B.when | C.since | D.before |
The question _______ we can get enough coal for the winter has not been cleared up yet .
A.that | B.if | C.which | D.whether |
Every possible means ________ to prevent the air pollution , but the sky is still not clear.
A.is used | B.are used | C.has been used | D.have been used |
Some people thought ________ possible to live on out space in the future .
A.it | B.it be | C.it is | D.that is |
_____his poor health ,he was still at work late into the night.
A. Despite | B.Besides | C. Apart from | D.In spite |
I don’t think that rock music is terrible , ______?
A.do I | B.don’t I | C.is it | D.isn’t it |