单项选择题

A．At a laboratory.
B．At a bank.
C．In a classroom.
D．In a department store.
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单项选择题
A) confirm C) claim B) inform D) convince
A．confirm
B．inform
C．claim
D．convince
单项选择题
A) Although C) Since B) Whether D) Despite
A．Although
B．Whether
C．Since
D．Despite
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