单项选择题

A．Husband and wife.
B．Boss and secretary.
C．Friends.
D．Neighbors.
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单项选择题
A．Environment.B．Genes.C．Parents.D．Both A and B
A．Environment.
B．Genes.
C．Parents.
D．Both A and B
单项选择题
We can conclude from the passage that we need to control noise pollution if ______.
A．we want to stay both psychologically and physically healthy
B．we don' t want to be physically destroyed
C．we want to cooperate well
D．we don' t want to be anxious
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