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Did you see the game?NO I didn't I ____visit my grandparents at that timeA happened to B was happen C happen to D happened

题目详情
Did you see the game?NO I didn't I ____visit my grandparents at that time
A happened to B was happen C happen to D happened
▼优质解答
答案和解析
选A happen to do 碰巧发生,碰巧在做……
要用过去时