单项选择题



How much would a 30-second spot cost at 6:30 p.m.

A．$150
B．$250
C．$350
D．$400
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单项选择题
What is the writer’s opinion of the current Internet situation
A．The increase of domain names has caused more spare.
B．The potential of the Internet has gone down because of viruses.
C．The industry should increase its efforts to improve Internet safety.
D．The writer’s opinion is not given.
单项选择题
How much will Sarah and Ted Johnson pay to enter the race
A．At least $20
B．At least $40
C．At least $100
D．At least $200
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