Mr Black and Miss White ___the teacher's office together(clean).怎么填?
Mr Black and Miss White are ___the teacher's office together(clean).又该怎么填?
人气：243 ℃ 时间：2020-01-30 07:00:10
解答
cleaned 或者 are cleaning .因为句子没有时间状语,所以可以用一般过去时态,或者用现在进行时态.意思上都讲得通.
are cleaning 后面这个句子,有are 这个现在进行时态的标志词了,所以用 cleaning 填空.
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