单项选择题

According to the passage wind is（）

A．moving air
B．lighter clouds
C．air pressure
D．cold air

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单项选择题

Which of the following statements is NOT true in the passage（）

A．Wind makes cold air higher and warm air lower.
B．Wind can even carry cars and trucks to the sky.
C．Wind makes all kinds of plants and flowers moving.
D．Wind moves clouds in the sky and brings about rain.

单项选择题

This short passage is most likely taken from （）

A．an advertisement
B．a laboratory
C．a manual
D．an article