【題目】Mr. Li asks the students_____in the river， because it’s too dangerous.

A. swim B. to swim C. not to swim D. to not swims

【答案】C

【解析】

試題分析：句意：李先生要求學(xué)生們不要在河里游泳，因?yàn)樘ｋU(xiǎn)。ask sb to do sth ，使/讓某人做某事，否定形式，直接在不定式to 前加not。故答案為C。

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