单项选择题

56（）

A．behind
B．about
C．after
D．concerning

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单项选择题

A．much be
B．has to be
C．can be
D．need be

问答题

Directions: For this part, you’re required to write an article with at least 120 words based on the outline in Chinese below .Write your article on the Answer Sheet.Movement of Population城乡人口互流现象城乡人口互流的利与弊自己的观点

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