单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．He gets ill at the same time every year.
B．He doesn’t get enough exercise.
C．He often has difficulty sleeping.
D．He’s sick with influenza throughout the winter.

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单项选择题

A．There aren’t enough cabinets.B．There is too much noise.C．Office supplies are taking up space.D．Some teaching assistants don’t have desks.

A．There aren’t enough cabinets.
B．There is too much noise.
C．Office supplies are taking up space.
D．Some teaching assistants don’t have desks.

单项选择题

Which scientist first applied the theories of radio waves to practical devices

A．Nikola Tesla.
B．Guglielmo Marconi.
C．Clerk Maxwell.
D．Heinrich Hertz.

Questions 23 to 25 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。

Questions 23 to 25 are based on the conversation you have just heard.