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单项选择题
A．Two million.B．Three million.C．Five million.D．Six million.
A．Two million.
B．Three million.
C．Five million.
D．Six million.
单项选择题
A．Beginners.B．Intermediate learners.C．Learners of special English.D．Beginners knowing ABC.
A．Beginners.
B．Intermediate learners.
C．Learners of special English.
D．Beginners knowing ABC.
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