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

问题描述:

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

答案选择A
1根据前文是一般过去时态
2.happen没有被动语态

答案选A happened to 碰巧,刚好
这里要用过去时态,表示事情发生在过去。

选A happen to do 碰巧发生,碰巧在做……
要用过去时