单项选择题

A．Companies can send ads indirectly to customers over the net.
B．Companies can send goods directly to department stores.
C．Customers can examine and compare goods in price.
D．Customers can get the goods before they pay for them.
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单项选择题
A．His father pulled him out in time.B．He stayed in an icebox.C．He left the area before the earthquake.D．Their house escaped the earthquake.
A．His father pulled him out in time.
B．He stayed in an icebox.
C．He left the area before the earthquake.
D．Their house escaped the earthquake.
填空题
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