Question

Lily regretted ______ to Mary’s birthday party last Sunday

1. A.
   not to go
2. B.
   not having been going
3. C.
   not going
4. D.
   not to be going

Answer 1

C
考查非谓语动词，Regret后接动名词作宾语。 句意：莉莉后悔上周没去玛丽的聚会。