单项选择题

Fruit is rich ________ vitamins.

A．with
B．in
C．at
D．of
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单项选择题
Stressful environments lead to unhealthy such as poor eating habits, which ________ increase the risk of heart disease.
A．in turn
B．in return
C．by chance
D．by turns
单项选择题
This album is ________ as it was the only one ever signed by the President.
A．unusual
B．unique
C．rate
D．special
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