Question

Remember ______ off the light when ______ to bed.

1. A.
   turning, going
2. B.
   to turn, to go
3. C.
   turning, to go
4. D.
   to turn, going

Answer 1

D
一是分清以下两个结构：remember to do sth=记住做某事，remember doing sth=记住曾做过某事；二是注意 when going to bed 相当于 when you go to bed。