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 seen
C．have I seen
D．do I see
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单项选择题
We''re going to a wonderful holiday which _________about 10 days.
A．will continue
B．will spend
C．will keep
D．will last
单项选择题
Judging from his accent, I can _________that he is from the south.
A．speak
B．look
C．tell
D．show
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