单项选择题

A．the schools are overcrowded
B．the classrooms are not big enough
C．there are too many students in a class
D．the encouragement on students’ individualism is not enough
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单项选择题
A．does not greatly improveB．greatly improvesC．does not improveD．is not as good as
A．does not greatly improve
B．greatly improves
C．does not improve
D．is not as good as
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