单项选择题


A．When
B．Since
C．While
D．As
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单项选择题
A．the conversationB．shynessC．othersD．themselves
A．the conversation
B．shyness
C．others
D．themselves
单项选择题
A．whatB．whateverC．lowD．however
A．what
B．whatever
C．low
D．however
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