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题目
题型:不详难度:来源:
Though ______, many laws of nature exist.
A.not having been discoveredB.having not been discovered
C.not having discovered  D.having not discovered

答案
A
解析
连词加现在分词短语作状语;此句等于:Though the laws of nature have not been discovered
核心考点
试题【 Though ______, many laws of nature exist.A.not having been discoveredB.having n】;主要考察你对现在分词等知识点的理解。[详细]
举一反三
—You were brave enough to raise objection at the meeting.
—Well, now I regret ________ that.
A.to doB.to be doing
C.to have doneD.having done

题型:不详难度:| 查看答案
—The light in the office is still on.
—Oh,I forgot ________.
A.turning it offB.turn it off
C.to turn it offD.having turned it off

题型:不详难度:| 查看答案
In some parts of London, missing a bus means ________ for another hour.
A.waitingB.to wait
C.waitD.to be waiting

题型:不详难度:| 查看答案
She reached the top of the hill and stopped ________ on a big rock by the side of the path.
A.to have restedB.resting
C.to restD.rest

题型:不详难度:| 查看答案
Go on ________ the other exercise after you have finished this one.
A.to doB.doing
C.withD.to be doing

题型:不详难度:| 查看答案
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