单项选择题

Questions 22 to 25 are based on the passage you have just heard.

A. Only when he has saved up enough money.
B. Only when he has grown dissatisfied with his simple shelter.
C. Only when he has satisfied his hunger.
D. Only when he has learned to build houses.

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单项选择题

A. It has color. B. It has a moving image. C. It costs less money. D. It is not on the market.

A. It has color. B. It has a moving image.
C. It costs less money. D. It is not on the market.

单项选择题

Questions 22 to 25 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。

Questions 22 to 25 are based on the passage you have just heard.