Question

Don't forget _____ the lights when you go out.

A. turning off
B. to turn off
C. turning on
D. to turn on

Answer 1

答案B
关掉灯的词组为turn off，题意为“当你出门时别忘记关灯”。题中强调出门时别忘记要干什么，“忘记要干……”的固定表达为forget to do，故选B。