4. Susan had quit her well-paid job and _________ as a volunteer in the neighborhood when I visited her last year.

A. is working B. was working C. has worked D. had worked

【答案】B

科学西限861c慧途有升482a量东a86f司优ef956a70公费技-4b61广元高学网软9bcfaf0d件

【解析】考查时态。句意：Susan已经辞去了高薪的工作。去年当我探望她的时候，她正在一个社区里做志愿者。Susan辞职发生在她当志愿者之前，had quit是过去完成时态，过去完成时态通俗的说就是“过去的过去”，且结合时间状语when I visited her last year可知，Susan做志愿者是过去的某个时间段发生的情况，故该空应用过去进行时态。B选项正确。

学西高有426f广费慧东a86f西件-4b61心科公费限861c技司途4a6b升482a量72d47043元高学高优ef956a705e21912c8acb网软9bcfaf0d点睛：过去进行时表示在过去某一时间段或某一段时间内正在发生或进行的动作或状态。