All employees are required to ensure that the computers are turned off before___

游客2025-06-14 22

问题 All employees are required to ensure that the computers are turned off before______the office.

选项 A、leaving
B、has left
C、to leave
D、leave

答案 A

解析语法：动名词1．before可作为介词，连词使用。2．before做连词时，后面应接完整的句子，(B)选项和(D)选项没有主语，因此排除。3．before做介词时，后不能接不定式，因此(C)选项排除．动名词(A)为正确选项。

转载请注明原文地址:https://tihaiku.com/zcyy/4117856.html

相关试题推荐

随机试题

最新回复(0)

MEMODearvaluedemployees,Ourmanagementwouldliketothankallofyouforma