单项选择题

Passage One Questions 26 to 29 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．It can cause flooding annually.B．It can carry diseases that affect animals.C．It can introduce too much salt into the soil.D．It can divert water from important crops.

A．It can cause flooding annually.
B．It can carry diseases that affect animals.
C．It can introduce too much salt into the soil.
D．It can divert water from important crops.

填空题

dramatically

Passage One Questions 26 to 29 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 29 are based on the passage you have just heard.