People are advised not to drive after drinking but seems not to help a lot.A. it B. whic

问题补充：

People are advised not to drive after drinking, but seems not to help a lot.

A. it

B. which

C. they

D. one

答案：

(答案→)A. it

B. which

C. they

D. one

解析：考查句型结构。关键词在于but，but后面应该接一个完整的句子，it指代前面提到的这件事情。句意：人们被建议不要酒后驾车。但是这样的建议似乎没有太大的帮助。