Im surprised that he to help me when I needed his help . A. should refuse B. would have

问题补充：

I\m surprised that he to help me when I needed his help .

A. should refuse

B. would have refused

C. should have refused to

D. may have refused

答案：

A. should refuse

B. would have refused

(答案→)C. should have refused to

D. may have refused

解析：should 可用于表示惊讶、不快、忧虑等感情色彩的句子中。如指过去的动作，则用“should +不定式的完成式”，而 may 和 would 一般不带感情色彩。