问题
选择题
-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
答案
答案：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