D
因?yàn)楹竺嬗昧薭ut,所以前面的句子一定要是一個(gè)獨(dú)立的句子,只有D是一個(gè)獨(dú)立的句子.
_____scores of times,but he still couldn't understand it.
_____scores of times,but he still couldn't understand it.
A.Having explained
B.Having been explained
C.Though it was explained
D.It was explained
為什么不選B呢?
A.Having explained
B.Having been explained
C.Though it was explained
D.It was explained
為什么不選B呢?
英語人氣：528 ℃時(shí)間：2019-10-20 00:16:19
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