【題目】 The chemistry teacher asked the students ________ more attention _________the lab clean.

A．to pay ,to keep B．to paying,to keeping

C．to pay , to keeping D．paying,keeping

【答案】C

【解析】

試題分析：句意：化學老師要求學生們要更多關注保持實驗室干凈。ask sb to do sth,要求某人做某事，pay attention to +名詞/動名詞，to在這里是介詞。故選C。

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