It’s time for class. So stop please.A. to talkB. talkingC. talkD. talked

问题补充：

It’s time for class. So stop , please.

A. to talk

B. talking

C. talk

D. talked

答案：

A. to talk

(答案→)B. talking

C. talk

D. talked

解析：stop to do表示“停下来去做某事”指的是去做另外的事；stop doing表示“停止做某事”。本句的意思是“上课了，请停止谈话。”故用talking。所以本题选B。