【題目】 They ______ on the project for almost one month before I joined them, and now we ______ on it as no good results have come out so far.

A. had been working; are still working

B. had worked; were still working

C. have been working; have worked

D. have worked; are still working

【答案】A

【解析】

試題分析：句意：在我加入前他們已經(jīng)進(jìn)行了將近一個月了，到目前我們還在進(jìn)行因為還沒有出來好的結(jié)果。第一句兩個動作有先后，joined是過去時，work發(fā)生的早用過去完成時，根據(jù)句意他們一直在做，故用過去完成進(jìn)行時。第二空是now,用現(xiàn)在進(jìn)行時。故答案為A.

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