单项选择题

A．Always.
B．Once.
C．Twice.
D．Three times.
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单项选择题
A．The distance-learning course is free of charge.B．The distance-learning course is taught by professors overseas.C．There is no regular class in the distance-learning course.D．There is no exam in the distance-learning course.
A．The distance-learning course is free of charge.
B．The distance-learning course is taught by professors overseas.
C．There is no regular class in the distance-learning course.
D．There is no exam in the distance-learning course.
单项选择题
A．She is a good friend of Professor Gilmore.B．She used to work for Professor Gilmore.C．She heard of it form other students.D．She arranges the job for Larry.
A．She is a good friend of Professor Gilmore.
B．She used to work for Professor Gilmore.
C．She heard of it form other students.
D．She arranges the job for Larry.
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