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It'ssaidinthenewspaperthat215morenewschoolsinZhengzhouby2020.A.arebuildingB.werebuiltC.havebuiltD.willbebuilt请告诉我为什么?THANK

题目详情
It's said in the newspaper that 215 more new schools___in Zhengzhou by 2020.
A.are building B.were built C.have built D.will be built
请告诉我为什么?THANK
▼优质解答
答案和解析
D
by 2020是一个信号词,表示这个动作发生在将来,所以要用将来是,同时学校被建表达被动意思,因此要用be built
整句话的意思是,据报道,到2020年郑州将新建215所学校.