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问二题英文ItMaryandTomthatIsawinthebookstore.AwasBwereCareDwillbe这题选A.我想知道为什么,不选B?

题目详情
问二题英文
It ______Mary and Tom that I saw in the bookstore.
A was B were C are D will be
这题选A.我想知道为什么,不选B?
▼优质解答
答案和解析
A 因为主语是 it