Question

I ________ yesterday but I was too busy.

A. came
B. have come
C. should come
D. should have come

Answer 1

答案D
考查固定句型。should have done sth表示“本应该做某事 (但实际上未做) ”，由句意“我本应该昨天来但我昨天太忙了。”可知D项正确。