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英语单选Theengineersmadetwobigplantsforthedam,wasneverputinforce.A.oneofwhichB.oneofthemC.everyongofwhichD.everyoneofthem

题目详情
英语单选
The engineers made two big plants for the dam,_____was never put in force.
A.one of which
B.one of them
C.everyong of which
D.everyone of them
▼优质解答
答案和解析
A
工程师为这个水坝造了两个工厂,其中一个从没使用过