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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Under (favor) ______ conditions, we can keep our promise and even finish the project ahead of time.

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He’ll get there at nine o’clock tomorrow morning at the ______ (early).