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英语
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I have been skating _____ nine oclock.A.for B.since C.at D.from
人气:165 ℃ 时间:2019-10-24 02:30:18
解答
B
since 从.以来, 一般和现在完成时连用. 注意题干中的 have been skating 现在完成进行时
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