Im surprised that he to help me when I needed his help . A. should refuseB. 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

D. may have refused

答案：

A. should refuse

B. would have refused

(答案→)C. should have refused

D. may have refused

解析：should 可以用来表示“竟然”的意思。依下文信息还要用情态动词+ have done 结构。全句意为：我很奇怪，当我需要他帮忙时，他竟然拒绝了。