单项选择题

Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A.Agriculture in the industrialized world.
B. Cultivated crops.
C. The association between roses and humans.
D. The discoveries of certain grasses.

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As Stanley said, if you want to know how, when or why Heraldeion and Eastern Canopus disappeared, there was were （） to refer to.

单项选择题

The author contrasts the i930s with the present in order to show that （）.

A. more people were unemployed in the 1930s
B. social programs are more needed now
C. unemployment now has less severe effects
D. now there is a greater proportion of elderly and handicapped people among those in poverty

Passage Two Questions 29 to 31 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。

Passage Two
Questions 29 to 31 are based on the passage you have just heard.