单项选择题

A．and
B．for
C．if
D．when
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单项选择题
What is the relationship between the speakers
A． They are strangers.
B． They are classmates.
C． They are customer and shop man.
单项选择题
A．membersB．varietiesC．qualitiesD．forms
A．members
B．varieties
C．qualities
D．forms
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