单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A．After midnight.
B．After she goes swimming.
C．When she is idle.
D．When there is a good program on.
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单项选择题
Broadcast stations use ______to transmit radio waves to the surrounding area.
A．a powerful antenna
B．a much smaller antenna
C．satellite dishes
D．cable
问答题
现有大学里逃课现象很严重2.你认为产生这种现象的原因是什么3. 怎么才能杜绝这一现象 Playing Truant__________________________________________________________________________________________________________________________________________________________________________________________
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