单项选择题

-- Hi, be careful.
-- Sorry, ______.

A．I don' t notice
B．I' m not noticing
C．I wasn' t noticing
D．I didn' t notice
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单项选择题
He said that he would drop ______ at the Union Club on his way home.
A．on
B．to
C．in
D．of
单项选择题
Would you like a cup of coffee first ______ shall we get down to business right now
A．then
B．when
C．or
D．otherwise
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