2. 外语
  3. A. live with their parents B. their own decisions C. most American families are usually small D. the family structure E. some si

A. live with their parents B. their own decisions C. most American families are usually small D. the family structure E. some si

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问题 A. live with their parents
B. their own decisions
C. most American families are usually small
D. the family structure
E. some similar features
F. has been dropping
The birth rate over the last few years______.
选项
答案F
解析 根据第四段最后一句“The birth rate has been declining steadily in recent years．”可知，出生率近年来持续下降。F项中的“dropping”是对第四段最后一句中“declining”的同义改写。
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