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SheforfouryearsbythetimeshetakesherqualifyingexaminationforDoctorofLawin2000A)studiedlawB)hadstudiedlawC)willhavebeenstudyinglawD)hadbeenstudyinglaw答案为什么是C

题目详情
She ______for four years by the time she takes her qualifying examination for Doctor of Law in 2000
A)studied law B)had studied law
C)will have been studying law D)had been studying law
答案为什么是C
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答案和解析
c选项是将来完成进行时因为语句中 she takes her 用的是一般现在式,所以说明2000年应该是将来的年代(请问这是哪年的题啊?2000年之前的吧),就是说事情发生在2000年之前,所以用将来时.然后,因为她的学业必须在考试之...