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 don't think that his watch is ______.
A．worth the price
B．worthy the price
C．worthy to buy
D．worth of the price
单项选择题
On hearing the bad news, he got up quickly, ______ the lunch unfinished.
A．leave
B．left
C．to leave
D．leaving
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