____several times,but unfortunately,the boy still couldn’t smooth away the probl
题型:不详难度:来源:
____several times,but unfortunately,the boy still couldn’t smooth away the problem on his own.A.Having been explained | B.The problem having been explained | C.The problem had been explained | D.Although the problem had been explained |
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答案
C |
解析
由连词but可知,前面应该是一个完整的句子,只有C项符合。若去掉but,答案可选B:分词的独立结构,也可以选D:although引导的让步状语从句。 |
举一反三
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