单项选择题

Which of the following can be inferred about the first trumpet players

A．They could not play all the notes of the scale.
B．They were not able to pick up the trumpet.
C．They could not play simple tunes.
D．They had difficulty improving upon the trumpet.

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单项选择题

According to the passage, before a VCR is sold on the market its original model should be tried out ______.

A．among ordinary consumers who are not technically minded
B．among people who are technically minded
C．among experienced technicians and potential users
D．among people who are in charge of public relations

单项选择题

What did the author mean by I am not alone in paragraph 1

A．He and his family all didn’t know how to use the machine.
B．His family supported his opinion.
C．Many people faced the trouble as he did.
D．He was a popular guy.