问题

mbered _____ 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;

正确答案是：

同类题型

I can’t wait______ the nice picture.

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We have very strict quality control and anything imperfect is ____, so customers feel secure about our products．

Can those ____ at the back of the classroom hear me

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