The doctor advised Vera strongly that she should take a holiday butdidn't help.A. itB. sh

问题补充：

The doctor advised Vera strongly that she should take a holiday, butdidn help.

A. it

B. she

C. which

D. he

答案：

(答案→)A. it

B. she

C. which

D. he

解析：考查it用法。It可以指代前面提到的同一事物，或者某件事情。本题因为有连词but说明后面不是从句，而是一个并列句，故不能使用which。She和he指人。句意：医生强烈建议她去度假，但是这个建议不起作用。故A正确。