问题描述：
He is not careful.He went to school in _____shoes,but not ____ones
A.a pair of,a couple of B.a pair of ,a pair of C.a couple of ,a pair of D.a couple of a couple of 选择哪个?帮我解析下
A.a pair of,a couple of B.a pair of ,a pair of C.a couple of ,a pair of D.a couple of a couple of 选择哪个?帮我解析下
问题解答：
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