单项选择题

A．It is a big problem in the management of the city.
B．It is a push needed to develop the city.
C．It is a cause of disintegration of the city’s social structure.
D．It is an obstacle to the development of the city.
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单项选择题
A．It is not convenient to use.B．It is very soft.C．It is not expensive.D．It is very hard.
A．It is not convenient to use.
B．It is very soft.
C．It is not expensive.
D．It is very hard.
单项选择题
A．He drinks milk every night.B．He gets enough sleep every day.C．He does a lot of exercise.D．He gets the genes of his father.
A．He drinks milk every night.
B．He gets enough sleep every day.
C．He does a lot of exercise.
D．He gets the genes of his father.
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