Ms. Arroya says that when workshop__________begins to slow down, it may be time to hiremore workers.A. product B. producerC. produceD. productivity

Ms. Arroya says that when workshop__________begins to slow down, it may be time to hiremore workers.

A. product
B. producer
C. produce
D. productivity

参考解析

解析:在when引导的状语从句中,主语要表示“工厂生产力”时,才能和动词slow down搭配使用,因此D为正确答案。

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