单项选择题

Obesity carries an increased risk of______.

A．mortality
B．mobility
C．longevity
D．maternity
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单项选择题
We now obtain more than two-thirds of our protein from animal sources, while our grandparents ______only one-half from animal sources.
A．originated
B．digested
C．deprived
D．derived
单项选择题
I have never seen a more caring, ______group of people in my life.
A．emotional
B．impersonal
C．compulsory
D．compassionate
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