问题补充:
Don’t forget all the lights when you leave the classroom.
A. to turn off
B. turning off
C. turn on
D. turning on
答案:
(答案→)A. to turn off
B. turning off
C. turn on
D. turning on
解析:考查forget的用法,forget to do 意为忘记去干某事 forget doing 忘记做过某事
句意为,不要忘记去关掉所有的灯,当你离开教室的时候。