单项选择题

It can be inferred from the passage that in order to make the trump work, ______ is needed.

A．air pressure
B．daily cleaning
C．keen eyesight
D．long fingers
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单项选择题
The author believes that the trumpet is particularly important because it ______.
A．is a religious instrument
B．has historical significance (意义)
C．can be used in rock bands
D．has a narrow range
单项选择题
Which of the following can be inferred about the first trumpet players
A．They had difficulty improving upon the trumpet.
B．They could not play simple tunes.
C．They were not able to pick up the trumpet.
D．They could not play all the notes of the scale.
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