问题描述：
There()a pair of shoes under the bed.A.are.B.isC.
There()a pair of shoes under the bed.A.are.B.isC.am What()in the bathroom.A.are.B.is C.am
老师讲答案是am两题都是am和is在什么情况下用区别是什么：
There()a pair of shoes under the bed.A.are.B.isC.am What()in the bathroom.A.are.B.is C.am
老师讲答案是am两题都是am和is在什么情况下用区别是什么：
问题解答：
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