Question

They had kept working for several weeks      everything was in order.

A．before

B．after

C．since

D．unless

Answer 1

A

試題分析：句意：他們持續不斷工作了幾個星斯后，一切才恢復正常。before “在……之前，過了多久后才……”；after “在……后”； since “自從”； unless “除非”。根據句意故選A
點評：連詞主要考查它的意義及用法，需要考生平時注意它們的區別及用法。還要會分析語言環境的影響。
即學即練：It won't be long     the he comes back.
A. before        B. after          C. since          D. unless
解析：A 句意：不久之后他就將回來。