There are two____(knife)on the table.用所给词的正确形式填空

问题描述:

There are two____(knife)on the table.用所给词的正确形式填空
还有:How many _____(people)are there in your family?

There are two (knives,名词复数) on the table.
How many (people,不变,本身就是复数) are there in your family?