Miss Wang asks the studentsin the river because it’s too dangerous.A. swimB. to swimC. no

问题补充：

Miss Wang asks the studentsin the river, because it’s too dangerous.

A. swim

B. to swim

C. not to swim

D. to not swim

答案：

A. swim

B. to swim

(答案→)C. not to swim

D. to not swim

解析：句意：王小姐要求学生们不要在河里游泳，因为太危险。ask sb to do sth ,否定形式，ask sb ont to do sth,故选C。