单项选择题

How much does it______to take the online training course

A．cost
B．give
C．pay
D．spend
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单项选择题
Please call me back______you see this message.
A．as well as
B．as early as
C．as far as
D．as soon as
单项选择题
Mr. Smith used to smoke______but he has given it up recently.
A．immediately
B．roughly
C．heavily
D．completely
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