单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．People working in a large factory.
B．People walking on crowded city streets.
C．An everyday activity in a small town.
D．A well-known historical event.

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单项选择题

A．Confidence.B．Preparation.C．Informativeness.D．Select appropriate materials.

A．Confidence.
B．Preparation.
C．Informativeness.
D．Select appropriate materials.

单项选择题

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

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

Passage One Questions 26 to 28 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。

Passage One Questions 26 to 28 are based on the passage you have just heard.