单项选择题

Questions 32 to 35 are based on the passage you have just heard.

A．To burn it on the fire to see whether it can break.
B．To press it in the size of an egg.
C．Add water to it to see whether it is shiny.
D．Take some of it in the testing machine.

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单项选择题

A．whenB．untilC．beforeD．after

A．when
B．until
C．before
D．after

单项选择题

According to the text,______.

A．war is a good way to solve economic problems
B．subsides for renewable energy is impractical
C．CO₂ emission is profitable in Europe
D．the government should pay for the cost of pollution

Questions 32 to 35 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。

Questions 32 to 35 are based on the passage you have just heard.