Mr. Black asks the kids in the river because it’s too dangerous.A. swimBto swim C. no

问题补充：

Mr. Black asks the kids in the river, because it’s too dangerous.

A. swim

Bto swim

C. not to swim

D. swims

答案：

A. swim

B. to swim

(答案→)C. not to swim

D. swims

解析：句意：布莱克先生不让这些孩子们在河里游泳，因为它太危险。考查固定短语ask sb. not to do sth意思：不让某人做某事。故选C