单项选择题


Questions 11～13 are based on a dialogue between a traveller and a receptionist. You now have 15 seconds to read Questions 11～13.
The family plans to stay in Boston for ______.

A．three days
B．four days
C．five days
D．six days
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填空题
In which century did William Harvery make his discovery about the circulation of the blood
单项选择题
The man has to______.
A．register by writing his name and address
B．register for his suitcases
C．register for the tour arrangement
D．register for the sake of security
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