Question

The reports went missing in 2012 and nobody _____them since.

A. sees                  B. saw

C. has seen               D. had seen

Answer

C

【解析】

试题分析：考查动词时态。句意：那些报告于2012年丢失了，从那以后没有人见过它们。此题解题的关键词是后面的since，此处意为：从那以后。这是现在完成时的标志。故选C。

考点：考查动词时态。

【名师点睛】本题抓住since这一现在完成时标志即可轻松解题。另外还有一些标志，already（肯定）, yet（否定，疑问）, just, before, recently, still, lately ,never, ever, never, twice, on several occasion, in the past few days/weeks/months/years,(up to)these few days/weeks/months/years, this morning/week/month/year, just, up to present, so far, up to now, till now, since+时间，这些常常出现在现在完成时句子中，考生可以了解归纳。