Ships may have to wait for a couple of days,_____ waves are not rough,permitting them to enter the harbor with safety.
A.after
B.while
C.when
D.since
详细,谢谢
Ships may have to wait for a couple of days,_____ waves are not rough,permitting them to enter the harbor with safety.
A.after
B.while
C.when
D.since
详细,谢谢
C
根据句意 排除D 选项A after引导时间状语从句 从句不可否定
While引导的从句的谓语动作必须是延续性的,并强调主句和从句的动作同时发生
when引导的从句的谓语动词可以是延续性的动词,又可以是瞬时动词。并且when有时表示“就在那时”。
此句中waves are not rough表示波浪平息之时 故选when。