The workers will go on strike if the demands they put forward are turned down.A. could　　　

问题补充：

The workers will go on strike if the demands they put forward are turned down.

A. could

B. would

C. /

D. Had.

答案：

A. could

B. would

(答案→)C. /

D. Had.

解析：

这题考查虚拟语气的用法，先行词是demand，advice等词，定语从句中用should do“should”可以省略。选C。