单项选择题

______the weather improves, we will suffer a huge loss in the tourist industry.

A．As
B．Since
C．While
D．Unless

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问答题

Thank you，Mr. Black. It’s a great honor to be appointed as Overseas Sales Manager. To be honest, this promotion came as quite a surprise to me. I’d like to think it’s mainly the contribution of the whole team．I’d like to thank all my colleagues in the company for their support and hard work. Due to their efforts, we’ve started some overseas project successfully. Looking to the future, I’d still like to maintain contact with everyone, even though I’ll be working at the management level．

填空题

What will happen if the duplicate copy of the letter is not returned by the deadline？ This offer will be （）on that date．

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