You will be late for school you don’t hurry.A. beforeB. ifC. whenD. after

问题补充：

You will be late for school you don’t hurry.

A. before

B. if

C. when

D. after

答案：

A. before

(答案→)B. if

C. when

D. after

解析：考查连词。Before在……之前；if如果；when当……时候；after

在……之后。句意：如果你不快点你上学将会迟到。所以选B。