If I had worked harder at school I in a comfortable office now．A. would sitB. would have

问题补充：

If I had worked harder at school, I in a comfortable office now．

A. would sit

B. would have sat

C. would be sitting

D. were sitting

答案：

A. would sit

B. would have sat

(答案→)C. would be sitting

D. were sitting

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