单项选择题

A．The bicycle is easily stolen.
B．The roads are narrow and unsuitable for bicycles.
C．There are many ups and downs in the city so riding a bike is tiring.
D．There are too many cars so it’s unsafe to ride a bike.
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单项选择题
A．She asks the man to wait for her at the train station.B．She will call the man when she arrives at the station.C．She and the man will take the 7:50 train.D．She is sorry for keeping the man waiting for her for an hour.
A．She asks the man to wait for her at the train station.
B．She will call the man when she arrives at the station.
C．She and the man will take the 7:50 train.
D．She is sorry for keeping the man waiting for her for an hour.
单项选择题
A．Because she thinks the man is seriously ill.B．Because the man can get immunized there for free.C．Because all the service is free of charge in the university health center.D．Because the vaccine has been invented there recently.
A．Because she thinks the man is seriously ill.
B．Because the man can get immunized there for free.
C．Because all the service is free of charge in the university health center.
D．Because the vaccine has been invented there recently.
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