单项选择题

Questions 19 to 21 are based on the passage you have just heard.

A. The black snow was a product of nature.
B. People should take greater care of environment.
C. Nature cycles of wildlife.
D. The rain looked like black dye.

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单项选择题

A. 19 years old. B. l6 years old.C. 35 years old. D. 25 years old.

A. 19 years old.
B. l6 years old.
C. 35 years old.
D. 25 years old.

填空题

struggle

Questions 19 to 21 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。

Questions 19 to 21 are based on the passage you have just heard.