-----How long do you think it will be _____man can finally solve the problem of
题型：不详难度：来源：
-----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 |
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答案
| D |
解析
试题分析：考查连词。本题考查it will … before …还有多久才能……。句意：——你认为人类还要多久才能解决癌症问题？——嗯，那还得看情况。故D正确。 |
举一反三
| He told me his story in private，__________ nobody else knew what had happened to him． |
Parents are advised to put books __________ they are easily accessible to children .| A．which | B．where | C．in which | D．who |
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_____the activities might seem childish, actually they require a lot of strength and determination.| A．Since | B．Although | C．Before | D．If |
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— Don’t you believe me?
— ________, I’ll believe ________ you say. | A．No; whatever | B．Yes; whatever | C．No; no matter what | D．Yes; no matter what |
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_____ there was no conclusive evidence, most people thought he was guilty.| A．Since | B．While | C．When | D．However |
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