Question

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

Answer 1

C。

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。