It was Mr Zhang that helped us out of the trouble. Without his help we it so easily.A. c

问题补充：

It was Mr Zhang that helped us out of the trouble. Without his help, we it so easily.

A. can’t manage

B. mustn’t have managed

C. couldn’t have managed

D. couldn’t manage

答案：

A. can’t manage

B. mustn’t have managed

(答案→)C. couldn’t have managed

D. couldn’t manage

解析：考查虚拟语气。根据语境这是与过去事实相反地虚拟语气，所以主句应用could/would/might+have done结构，故选C。