单项选择题

It is important to sound polite when answering the phone, whoever it is from.

A．在电话中回答他人问题时要礼貌有加，并问明是谁打来的，这一点很重要。
B．接听重要电话时要彬彬有礼，问明是谁打来的。
C．不管电话是谁打来的，都应礼貌接听，这一点很重要。
D．很重要的一点是，在电话中回答问题时应礼貌有加，无论是谁打来的。
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单项选择题
From the last sentence of the first paragraph we learn that ______ .
A．in the future all the Americans will use credit cards
B．credit cards are mainly used in the United States today
C．nowadays many Americans do not pay in cash
D．it is now more convenient to use credit cards than before
填空题
to collect
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