单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．You can grow vegetables vertically.
B．You can raise plants in a confined area.
C．You can plant a wide variety of plains together.
D．You can enjoy the beautiful scenery.

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单项选择题

A．On a mountain path.B．In a supermarket.C．On a road.D．In a railway station.

A．On a mountain path.
B．In a supermarket.
C．On a road.
D．In a railway station.

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Questions 19 to 22 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。

Questions 19 to 22 are based on the conversation you have just heard.