单项选择题

In no case ______ forget the help that they gave us.

A．do we should
B．should we
C．we should
D．we do should

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热门试题

单项选择题

If you copy the online information onto your PC device, you will （）

A．save the time of connecting to the online system
B．reduce the risk of losing information
C．pay just local telephone charges
D．get local information only

单项选择题

Online services work by providing users with （）

A．a base of information
B．dumb terminals
C．a host system
D．a satellite