单项选择题

— 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

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单项选择题
I am feeling sick. I ()so much chocolate.

A. needn’t have eaten
B. couldn’t have eaten
C. mustn’t have eaten
D. shouldn’t have eaten
单项选择题
不同的一项是（）

A.modern
B.surprise
C.traveler
D.German
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