20.Three fifths population of this city _____________ (be) from other cities21.I _______________ (study) English at this school for three years.22.Do you have any problem ______________ (get) to the top of the hill?

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20.Three fifths population of this city _____________ (be) from other cities21.I _______________ (study) English at this school for three years.22.Do you have any problem ______________ (get) to the top of the hill?
20.Three fifths population of this city _____________ (be) from other cities
21.I _______________ (study) English at this school for three years.
22.Do you have any problem ______________ (get) to the top of the hill?

20.Three fifths population of this city _____________ (be) from other cities21.I _______________ (study) English at this school for three years.22.Do you have any problem ______________ (get) to the top of the hill?
20 is
21 have been studying
22 in getting

20、英语中的分数做主语时,它是单数还是复数根据它所修饰的中心名词是否为可数名词而定。
答案为 are
population 单独使用时,为不可数名词,谓语动词用单数;但是一旦前面有百分数或分数短语修饰时,就视为可数,谓语动词用复数
There fourths of the money _____(have)...

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20、英语中的分数做主语时,它是单数还是复数根据它所修饰的中心名词是否为可数名词而定。
答案为 are
population 单独使用时,为不可数名词,谓语动词用单数;但是一旦前面有百分数或分数短语修饰时,就视为可数,谓语动词用复数
There fourths of the money _____(have) been spent on books
has
money 为不可数名词,所以谓语动词用单数

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