题目内容

-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
C
根据下文内容可知是之前没注意,用过去时,根据上下文的内容可知答案为C
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