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
A．It has a dense population.B．It has many towering buildings.C．There are 200 vehicles for every kilometer of roadway.D．There are many museums and palaces.
A．It has a dense population.
B．It has many towering buildings.
C．There are 200 vehicles for every kilometer of roadway.
D．There are many museums and palaces.
单项选择题
A．It is not convenient to use.B．It is not expensive.C．It is very soft.D．It is very hard.
A．It is not convenient to use.
B．It is not expensive.
C．It is very soft.
D．It is very hard.
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