单项选择题

Passage One
Questions 26 to 28 are based on the passage you have just heard.

A．When you have small children.
B．When you live in an apartment.
C．When space is limited.
D．When you live in the city.
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填空题
Landfills are like compost piles in that they speed up decomposition of the buried trash.
单项选择题
A．Do much research in many fields of science.B．Understand people in other countries better.C．Both A and B.D．Neither A nor B.
A．Do much research in many fields of science.
B．Understand people in other countries better.
C．Both A and B.
D．Neither A nor B.
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