题目内容
Junk messaging has been a headache for years, ＿＿the action taken by the authori-ties has not yet produced the results expected
| A．as | B．but | C．so | D．before |
B
解析试题分析：考查连词：句意：垃圾消息是多年以来一直让人头痛的事情，但是政府采取的行动还没有达到预想的效果。两句话是转折关系，用but，as正如，so因此，before在….前面，选B。
考点：考查连词
I’d like a room windows look out over the sea．
| A．whose | B．which | C．where | D．that |
______ money is important, many teenagers say they want to do jobs they enjoy.
| A．Because | B．Unless | C．If | D．Although |
—How long do you think it will be______ man can finally solve the problem of cancer?
—Well，it depends
| A．when | B．until | C．after | D．before |
The strange man asked me to hand the letter to _____ I met in the police station, saying it was very important.
| A．whoever | B．whatever | C．whichever | D．whomever |
Expect everything to go wrong in advance, ________ you may feel at a loss when it does.
| A．or | B．and | C．but | D．so |
He made a mistake, but finally he solved the problem __________ it got worse.
| A．until | B．before | C．when | D．as |
It is a long time ________ they separated, but it won’t be long ________ they meet again.
| A．since, before | B．after, when |
| C．since, when | D．after, before |