单项选择题

A．It takes skill.
B．It pays well.
C．It’’s a full-time job.
D．It’’s admired worldwide.
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单项选择题
Cramming is not too effective although it may be your only option.
A．Y
B．N
C．NG
单项选择题
A．$240.B．$290.C．$250.D．$200.
A．$240.
B．$290.
C．$250.
D．$200.
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