单项选择题


A．comment
B．concentrate
C．agree
D．depend
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单项选择题
A．inquiredB．worriedC．concernedD．observed
A．inquired
B．worried
C．concerned
D．observed
单项选择题
Experiments showed that nondrinkers had______.
A．higher blood pressure
B．lower blood pressure
C．larger amounts of' good cholesterol
D．smaller amounts of good cholesterol
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