【題目】I remembered __________ the door before I left the office, but forgot to turn off the lights.

A. locking B. to lock

C. having locked D. to have locked

【答案】B

【解析】句意：我記得在離開辦公室前要鎖門，但是忘了關(guān)燈。remember to do sth. 意為“記得要去做某事”，remember doing sth. 意為“記得做過某事”。根據(jù)句意可知選B。

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