单项选择题

According to the passage, the maximum intensity of sound coming from commercials______.

A．does not exceed that of programs
B．is greater than that of programs
C．varies over a large range than that of programs
D．is less than that of programs

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单项选择题

People's decisions to migrate might be influenced by all the following EXCEPT______.

A．personalities.
B．education.
C．marital status.
D．abilities.

单项选择题

According to the passage, pushing factors include the following EXCEPT______.

A．unemployment
B．famine
C．weather
D．war