More heavy rains______in summer than any other time of the year.A.happenedB.have happenedC

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More heavy rains______in summer than any other time of the year.

A.happened

B.have happened

C.happen

D.will happen

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。