--Why has he been staying at home these days?

     --He ___________ since a month ago.

   A. has been out of work            B. was out of work

   C. has lost his work               D. had left from his work

A


解析:

答語(yǔ)中有since引導(dǎo)的時(shí)間狀語(yǔ)，限定了句中的動(dòng)詞為持續(xù)性動(dòng)詞。

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