单项选择题

A．even if
B．though
C．unless
D．on the occasion
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单项选择题
A．althoughB．moreoverC．butD．therefore
A．although
B．moreover
C．but
D．therefore
单项选择题
A．At a library.B．At a store.C．At a bank.D．At a university class.
A．At a library.
B．At a store.
C．At a bank.
D．At a university class.
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