单项选择题

What recommendation does the professor make about volume

A．Always use a microphone.
B．Avoid large rooms.
C．Never vary the volume.
D．Not to shout.
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单项选择题
According to the professor, what can a speaker do to keep an audience's attention
A．Speak very loudly.
B．Ask questions frequently.
C．Vary tone, volume, and speed of speech.
D．Limit the speech to fifteen minutes.
单项选择题
What are the students going to use a tape recorder for
A．To practice speaking slowly.
B．To record a voice from the television.
C．To play a speech by the professor.
D．To evaluate their own voices.
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