Youd better football in the street.A. playB. not playC. not to playD. plays

问题补充：

Youd better football in the street.

A. play

B. not play

C. not to play

D. plays

答案：

A. play

(答案→)B. not play

C. not to play

D. plays

解析：固定结构had better表示最好做某事，后跟动词原形；其否定形式在动词原形的前面加not即可。结合语境可知是考查had better的否定结构，故选B。