单项选择题

A．Giving advice.
B．Presentation.
C．Discussion.
D．Independent thinking.
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单项选择题
A．At five o’clock.B．At five thirty.C．At four thirty.D．At four o’ clock.
A．At five o’clock.
B．At five thirty.
C．At four thirty.
D．At four o’ clock.
单项选择题
A．In a research institute.B．On the beach.C．In a zoo.D．On the campus.
A．In a research institute.
B．On the beach.
C．In a zoo.
D．On the campus.
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