Question

— The pop group S.H.E is said to have been invited to 2013 CCTV Spring Festival Show.
— Really? It’s a long time _______ they three performed together on the mainland.

A．since

B．that

C．when

D．before

Answer 1

A

解析试题分析：根据句中的时态可知，从句用一般过去时而主句一般现在时，这样就产生了时间差，since引导的从句中的谓语动词如果是短暂性动词，时间从动作结束时算起。故选A。句意：她们很长时间没有在大陆表演了。
考点：考查状语从句的连接词。