单项选择题

A．It is a network for shopping malls, offices and homes.
B．It relieves the heavy burden of teachers in school.
C．It simplifies the process of making friends online.
D．It quickens sales of software products and intelligence.
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单项选择题
A．Worse than in the past.B．As bad as in the past.C．Not so dangerous as in the past.D．As necessary as in the past.
A．Worse than in the past.
B．As bad as in the past.
C．Not so dangerous as in the past.
D．As necessary as in the past.
单项选择题
A．Africans are not very brave and resourceful.B．There is no treatment or healthcare center at all.C．There were no effective prevention systems.D．There was no formal education in Africa at all.
A．Africans are not very brave and resourceful.
B．There is no treatment or healthcare center at all.
C．There were no effective prevention systems.
D．There was no formal education in Africa at all.
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