33. When I came back,I noticed that he was still sitting in the office.He seemed_________ for someone.

A.waited                      B.to have waited

C.to be waiting                 D.to wait

C


解析:

不定式to加進(jìn)行時(shí)態(tài)，表示“……正在做”，句意為“他坐在那兒，似乎正在等人”。?

答案：C?

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