单项选择题


A．that
B．where
C．which
D．when
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单项选择题
A．studiesB．investigatesC．selectsD．searches
A．studies
B．investigates
C．selects
D．searches
单项选择题
A．convincinglyB．convenientlyC．contemporarilyD．consequently
A．convincingly
B．conveniently
C．contemporarily
D．consequently
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