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题目
题型:不详难度:来源:
________scores of times, but Derek still couldn’t understand how to use past participle in a concrete situation.
A.Having explainedB.Having been explained
C.Though it was explainedD.It was explained

答案
D
解析
因为有连词but,前面应是完整的句子,排除A,B; Though不能和but同时使用,所以选D。
核心考点
试题【________scores of times, but Derek still couldn’t understand how to use past par】;主要考察你对连词等知识点的理解。[详细]
举一反三
—Did you get home a little earlier yesterday?
—No. It was six o’clock________ we got home.
A.thatB.whenC.sinceD.after

题型:不详难度:| 查看答案
-- What’s your plan for this winter vacation?
-- I’ll take an express train to Dalian for my holiday ______ school ends.
A.whileB.untilC.immediatelyD.unless

题型:不详难度:| 查看答案
I had hardly opened the door      he hit me.
A.thanB.whenC.whileD.until

题型:不详难度:| 查看答案
You will succeed in the end ________ you give up halfway.
A.even ifB.as thoughC.as long asD.unless

题型:不详难度:| 查看答案
We don’t doubt _______ we will complete all the projects before the year 2010.
A.whenB.ifC.thatD.whether

题型:不详难度:| 查看答案
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