单项选择题

Seldom ______ my boss in such good mood(心情) since I came to work in this company.

A．I saw
B．I have been
C．have I seen
D．do I see
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单项选择题
If you ______ smoking and drinking, your health will improve soon.
A．gave up
B．give up
C．had given up
D．will give up
单项选择题
If you travel in a foreign country, a tour ______ may save you a lot of trouble.
A．director
B．helper
C．guide
D．assistant
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