单项选择题

A．if only
B．how
C．whether
D．why
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单项选择题
A．appearedB．seemedC．lookedD．felt
A．appeared
B．seemed
C．looked
D．felt
单项选择题
What is the relationship between the speakers
A． They are friends.
B． They are strangers.
C． They are brother and sister.
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