—Thelightintheofficeisstillon.—Oh,Iforgot

問題詳情：

—The light in the office is still on.

—Oh, I forgot _______.

A. turning it off    B. turn it off   C. to turn it off  D. having turned it off

【回答】

C  forget to do sth.“忘記(要)做某事”。

知識點：動詞和動詞短語

題型：選擇題