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题文

--Be careful! You might fall into the water.
--Thank you. I____.I______ so close to the pool.

A.didn't know; am standing
B.don't know; am standing
C.didn’t know; was standing
D.didn't know;Would stand
科目 英语   题型 单选题   难度 中等
知识点: 时态辨析
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