填空题

A congratulating
B canceling
C warning
D postponing
E offering
F refusing
G booking
H confirming ______

【参考答案】

B

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单项选择题

to prevent problems it is important to

A．define roles clearly.
B．work as efficiently as possible.
C．treat each other with extra care.

单项选择题

A．outline
B．plan
C．determine
D．propose

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