单项选择题

A．Engineering.
B．Computer science.
C．Education.
D．Scienc
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单项选择题
A．By promoting the ad service to others companies.B．By selling their products through this on]inc ad store.C．By using the Internet service and the time spent on it.D．By placing ads for other companies on their sit
A．By promoting the ad service to others companies.
B．By selling their products through this on]inc ad store.
C．By using the Internet service and the time spent on it.
D．By placing ads for other companies on their sit
单项选择题
A．Outside of Cindy’s house.B．Inside a club named Palace.C．At the city zoo.D．In the dark parking lot.
A．Outside of Cindy’s house.
B．Inside a club named Palace.
C．At the city zoo.
D．In the dark parking lot.
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