英语改错题 however,some have realized the serious problem of pollutions caused by the car.还有一个,忘了most americans would find them hard to think what life would look like without a car.

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英语改错题 however,some have realized the serious problem of pollutions caused by the car.还有一个,忘了most americans would find them hard to think what life would look like without a car.

英语改错题 however,some have realized the serious problem of pollutions caused by the car.还有一个,忘了most americans would find them hard to think what life would look like without a car.
英语改错题 however,some have realized the serious problem of pollutions caused by the car.
还有一个,忘了
most americans would find them hard to think what life would look like without a car.

英语改错题 however,some have realized the serious problem of pollutions caused by the car.还有一个,忘了most americans would find them hard to think what life would look like without a car.
however,some have realized the serious problems of pollution caused by the car.
pollution是不可数,不能用复数,problem是可数,得用复数
希望能帮到您,

第一句改pollutions成pollution,其他的都是对的,problem这里是一类问题,即汽车引起的污染,因而不用复数,是正确的
后一句把them改成it,因为这里的it替代的是后面的不定式,这里需要一个形式宾语,因而不能用them,只能用it