单项选择题

How does the disease mentioned in the passage spread（）

A．Through food.
B．Through air
C．Through insects.
D．Through body fluids.

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问答题

Exposure to all media is important and people sometimes tend to use more media if？

单项选择题

A．They were drawing pictures.
B．They were watching TV.
C．They were making a telephone call.
D．They were tidying up the drawing room.

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