— You always forget to lock the door.
— Yes, but this time I forgot ______ the door.

A. to lock
B. have locked
C. have to lock
D. having locked
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科目：高中英語 來源：專項題 題型：單選題

— You always forget to lock the door.
— Yes, but this time I forgot ______ the door.
[     ]
A. to lock
B. have locked
C. have to lock
D. having locked

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