Question

— Look, the light in the living room is still on.
—Oh, I forgot _______.

A．turning it off

B．turn it off

C．to turn it off

D．having turned it off

Answer 1

C

試題分析：句意：——看，客廳里的燈還亮著�！�—哦，我忘了關燈。forget doing sth.對做過的事忘記了。forget to do sth.忘了去做某事。根據the light in the living room is still on.可知燈還亮著，因此忘了去關燈。
故選C。