单项选择题

A．To play games with them.
B．To help solve their psychological problems.
C．To send they to the hospital.
D．To make them aware of its harmfulness.
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单项选择题
A．He saw CN Tower he visited on TV.B．He has visited CN Tower twice.C．He has visited CN Tower once.D．He will visit the CN Tower in June.
A．He saw CN Tower he visited on TV.
B．He has visited CN Tower twice.
C．He has visited CN Tower once.
D．He will visit the CN Tower in June.
单项选择题
A．Professionals.B．College students.C．Beginners.D．Intermediate earners.
A．Professionals.
B．College students.
C．Beginners.
D．Intermediate earners.
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