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英语
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The astronauts have _____ to the space station twice
A.gone B.been C.went D.be
说明原因
人气:325 ℃ 时间:2019-09-29 04:27:25
解答
选B
gone指去了,现在还没回来
been指去了,现在已经回来了
went是短动词,不能用于完成时
be是现在分词,完成时的have后面要用过去分词
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