单项选择题

A．To attract more students.
B．To make the courses suitable for students of all levels.
C．To let the students have a good rest.
D．To help everyone to make new friends, have fun and improve their English.
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单项选择题
A．Chemicals.B．Vapour.C．Water.D．Gas.
A．Chemicals.
B．Vapour.
C．Water.
D．Gas.
单项选择题
A．The speaker’s opinion about American society.B．The relationship between American parents and their children.C．American young people’s independence.D．American social values.
A．The speaker’s opinion about American society.
B．The relationship between American parents and their children.
C．American young people’s independence.
D．American social values.
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