单项选择题

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

A．To preserve it longer.
B．To give it a particular taste.
C．To make it smoother.
D．To increase the nutrition.
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单项选择题
A．To stay with the people who has caught a cold.B．To touch the nose and eyes after someone nearby coughed.C．To stand in the air without few clothes on.D．To eat the food without washing hands.
A．To stay with the people who has caught a cold.
B．To touch the nose and eyes after someone nearby coughed.
C．To stand in the air without few clothes on.
D．To eat the food without washing hands.
单项选择题
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.
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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