Many changes_____(take)place over the past ten years/ 填什么?

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Many changes_____(take)place over the past ten years/ 填什么?

Many changes_____(take)place over the past ten years/ 填什么?
Many changes_____(take)place over the past ten years/ 填什么?

Many changes_____(take)place over the past ten years/ 填什么?
have taken
注:over the past ten years在过去的十年,发生了很多变化.用现在完成时.