单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

In the fields. B) At the market. C) In a plant garden. D) In a classroom.

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单项选择题A．Because they were driven by steam power.B．Because they did the work that animals used to do.C．Because they pulled cars full of coal.D．Because they were made of iron.

A．Because they were driven by steam power.
B．Because they did the work that animals used to do.
C．Because they pulled cars full of coal.
D．Because they were made of iron.

单项选择题A) enlarged BI increased C) intensified D) expanded

A) enlarged BI increased C) intensified D) expanded

Questions 11 to 18 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。

Questions 11 to 18 are based on the conversation you have just heard.