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What ____ the forest in China in the last 10 years?

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What ____ the forest in China in the last 10 years?
A.has happened to B.was happened C.has been happened to
请问为什么,
What ____ the forest in China in the last 10 years?
A
in the last 10 years是现在完成时的时间状语,所以从A C中选,has happened to 是 现在完成时的主动形式,has been happened to 是 现在完成时的被动形式,而happen无被动形式,所以正确答案是A