As an employer, you should make sure your workers (train)________on how to do th

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问题 As an employer, you should make sure your workers (train)________on how to do their work well.

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答案 are trained

解析本题考查被动语态。分析句子结构可知，make sure后接的宾语从句中，workers和train之间是被动关系，即“员工被培训”，所以空格处应填入train对应的被动语态are trained。

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