单项选择题

A．Neglect the problems and pay chief attention to its benefits.
B．Make improvements to the system.
C．Abandon the system and build a new one.
D．Introduce a better system from the United States.
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单项选择题
A．Become more generous.B．Become more thoughtful.C．Become more sociable.D．Become more broad-minded.
A．Become more generous.
B．Become more thoughtful.
C．Become more sociable.
D．Become more broad-minded.
单项选择题
A．It breaks down at times.B．The alarms sometimes do not sound.C．There are a lot of false alarms for small quakes.D．The computer controlling the system gives wrong orders occasionally.
A．It breaks down at times.
B．The alarms sometimes do not sound.
C．There are a lot of false alarms for small quakes.
D．The computer controlling the system gives wrong orders occasionally.
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