单项选择题

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

A．The use of steel in building construction.
B．Computer usage.
C．Database on computer.
D．Building construction.

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单项选择题A．An arguement for environmental protection.B．An arguement against environmental protection.C．An arguement for common citizens.D．A clarification of a misconception about environment pollution and its cost.

A．An arguement for environmental protection.
B．An arguement against environmental protection.
C．An arguement for common citizens.
D．A clarification of a misconception about environment pollution and its cost.

单项选择题A．How to increase farm land.B．What is the biggest problem in agriculture.C．How to satisfy the needs of the farmers.D．A solution to problems in land use.

A．How to increase farm land.
B．What is the biggest problem in agriculture.
C．How to satisfy the needs of the farmers.
D．A solution to problems in land use.

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.