单项选择题

Passage Two
Questions 30 to 32 are based on the passage you have just heard.

A. Cold and wet are not responsible for catching colds.
B. No one caught a cold even they were kept cold and wet.
C. A cold virus caused a cold in volunteers.
D. h was easier to catch a cold indoors in winter.

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单项选择题

A. In the places where metal expands. B. fn the places where rails get crossed. C. In the places where metal is jointed. D. In the place where the bridge bends out of shape.

A. In the places where metal expands.
B. fn the places where rails get crossed.
C. In the places where metal is jointed.
D. In the place where the bridge bends out of shape.

Passage Two Questions 30 to 32 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。

Passage Two
Questions 30 to 32 are based on the passage you have just heard.