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单选题

Cet-4-1.1-Exercise 01In a ______ of 14 studies that looked at physical activity and academic performance, investigators found that the more children moved, the better their grades were in school.

A. commitment
B. observing
C. review

单选题

Cet-4-1.1-Exercise 02Immigrant parents could talk about their country of ______ and why they emigrated to the United States.

A. origin
B. provoke
C. deals

单选题

Cet-6-1.1-Exercise 01As careers and vocations become less available during times of ______, adolescents may be especially hard hit. Such difficult economic times may leave many adolescents confused about their roles in society.

A. tolerance
B. recession
C. entail

单选题

Cet-6-1.1-Exercise 02For those who believe that technological progress has made the world a better place, such disruption is a natural part of rising ______. Although innovation kills some jobs, it creates new and better ones, as a more productive society becomes richer and its wealthier inhabitants demand more goods and services.

A. indication
B. deals
C. prosperity

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