加急The population of the city,twenty percent of which( ),( )10% in the last three years.A are Japanese,has risen byB are Germans,has fallen byC is German,have increased toD is Japanese,Have been reduced by为何不能选B

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加急The population of the city,twenty percent of which( ),( )10% in the last three years.A are Japanese,has risen byB are Germans,has fallen byC is German,have increased toD is Japanese,Have been reduced by为何不能选B

加急The population of the city,twenty percent of which( ),( )10% in the last three years.A are Japanese,has risen byB are Germans,has fallen byC is German,have increased toD is Japanese,Have been reduced by为何不能选B
加急
The population of the city,twenty percent of which( ),( )10% in the last three years.
A are Japanese,has risen by
B are Germans,has fallen by
C is German,have increased to
D is Japanese,Have been reduced by
为何不能选B

加急The population of the city,twenty percent of which( ),( )10% in the last three years.A are Japanese,has risen byB are Germans,has fallen byC is German,have increased toD is Japanese,Have been reduced by为何不能选B
A
第一个之所以用are,twenty percent of the population 表示的是20%的人,用复数
第二个,主语为The population,population此时作为人口来讲,是不可数名词,所以用has risen by

A.
twenty percent of which ( ),括号中的be动词应为are,"Germans"这个单词是错误的,所以选A.

A 前面一个主要是具体指人,而后面的主语明显是population 所以用单数

选A和B

A 前面一个主要是具体指人,而后面的主语明显是population 所以用单数.我觉得fallen 后应该是to