单项选择题

A．Nitrates and nitrites.
B．Penicillin.
C．Packaging labels.
D．Additive medicine.
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单项选择题
A．She hasn’t liked the recent weather.B．She has been a little sick.C．She’s finally gotten over her fever.D．She’s had a lot of bad luck lately.
A．She hasn’t liked the recent weather.
B．She has been a little sick.
C．She’s finally gotten over her fever.
D．She’s had a lot of bad luck lately.
单项选择题
A．A stamp.B．An envelope.C．Two tickets.D．Some flight insurance.
A．A stamp.
B．An envelope.
C．Two tickets.
D．Some flight insurance.
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