Question

—You should be careful when _______.

—Yes, I will. I’d like to know when ________ to have a rest.

1. A.
   driving; stopping
2. B.
   driving; to stop
3. C.
   to drive; stopping
4. D.
   to drive; to stop

Answer 1

B
此题重点考查动词短语stop to do sth,表示停下来去做某事。