单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．How to operate the computer.
B．How to have a break after work.
C．How to choose the right glasses.
D．How to avoid eye problems before computer.
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单项选择题
A．Its flavor is special.B．It’s healthy food.C．It goes well with fish.D．A high grade of fish is used in its preparation.
A．Its flavor is special.
B．It’s healthy food.
C．It goes well with fish.
D．A high grade of fish is used in its preparation.
填空题
C
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