You can not see the manager ______ you have made an appointment with him.A、ifB、

游客2024-07-06  9

问题 You can not see the manager ______ you have made an appointment with him.

选项 A、if
B、except
C、unless
D、when

答案 C

解析 unless引导条件状语从句,表示“除非……”。通常情况下,条件状语从句主要是由if或unless引导,例如:They have a meeting every Friday, unless there is nothing to discuss.(他们每星期五开一次会,除非没有事情可商谈。)If I were you, I’d go to night school.(我要是你,我会去上夜校。)
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