Question

--Alice, why didn't you come yesterday?
--I _________, but I had an unexpected visitor.

A．had

B．would

C．was going to

D．did

Answer 1

C 

当不定式在某些结构后作复合谓语时，不定式符号 to后的内容可以省略。常见的结构有：be able to，be going to，have to，ought to，used to等。