Question

【题目】By the end of last year they ______ 1,000 machines. ( )

A.turned outB.had turned outC.would turn outD.had been turned out

Answer 1

【答案】B

【解析】

句意：到去年年底，他们已经生产了1000台机器。根据时间到去年年底，可知此句是过去完成时，故选B。