单项选择题

A．He has been ill.
B．He hasn’’t yet found a topic.
C．He was busy studying for an exam.
D．He didn’’t know when it was due.
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单项选择题
Only large companies and businesses use the Internet to do business.
A．Y
B．N
C．NG
单项选择题
A．The native traditions were subjected by the immigrants’’ authority.B．The native traditions were too ancient to be useful to the modern countries.C．The native traditions were dead ones.D．Both A and C.
A．The native traditions were subjected by the immigrants’’ authority.
B．The native traditions were too ancient to be useful to the modern countries.
C．The native traditions were dead ones.
D．Both A and C.
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