单项选择题

A．They are limited but effective.
B．They belong to the best in the world.
C．They are rapidly expanding.
D．Both A and C
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单项选择题
A．Mostly Chinese.B．Only sometimes the foreign language.C．Mostly the students’ language.D．Each language about half the time.
A．Mostly Chinese.
B．Only sometimes the foreign language.
C．Mostly the students’ language.
D．Each language about half the time.
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S38
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