单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．Trying to telephone someone.
B．Attending a concert.
C．Waiting in line.
D．Canceling reservations.
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单项选择题
A．The man.B．The woman.C．Both the man and the woman.D．The woman did while the man didn’t.
A．The man.
B．The woman.
C．Both the man and the woman.
D．The woman did while the man didn’t.
单项选择题
A．Uses of cold sea water.B．Irrigating desert areas.C．Techniques for preserving the environment.D．Techniques of cultivating plants.
A．Uses of cold sea water.
B．Irrigating desert areas.
C．Techniques for preserving the environment.
D．Techniques of cultivating plants.
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