【題目】They observed that two of the teams seemed __________ significant progress.

A. making B. to make

C. to have made D. having made

【答案】C

【解析】考查非謂語動詞。seem to do sth.“好像做某事”。句意：他們注意到這些團隊中的這兩個隊好像取得了重大的進步。根據(jù)句意可知，此處描述的動作已完成，應使用完成時。故選C。

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