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Tim ___since he lost his job three weeks ago.

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Tim ___since he lost his job three weeks ago.
A) had been unemployedB) was unemployedC) has been unemployed D) has unemployed
Tim ___since he lost his job three weeks ago.
选 C 【since 是现在完成时的标志,be unemployed 失业的】
再问: 为什么不选A哪?
再答: A 是过去完成时,但since 是现在完成时的标志,再如 :He has lived here since two years ago.