单项选择题


A．switched
B．performed
C．launched
D．altered
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单项选择题
A．prepareB．preparedC．to prepareD．preparing
A．prepare
B．prepared
C．to prepare
D．preparing
单项选择题
It is really surprising that the hotel should be ______ booked even at this time of the year.
A．immediately
B．quickly
C．heavily
D．intensely
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