问题描述：
1.It is strange that such a thing ________in your company.A.happen B.happens C.happened
1.It is strange that such a thing ________in your company.
A.happen B.happens
C.happened D.has happened
为啥
1.It is strange that such a thing ________in your company.
A.happen B.happens
C.happened D.has happened
为啥
问题解答：
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