Question

This________is tall for his age，so it is easy to recognize him when he is among the ________of his age．

1. A.
   child，child
2. B.
   child，childrens
3. C.
   children，children
4. D.
   child，children

Answer 1

D
解析：

分析：child的复数形式是children．第一个空格前的this说明要用单数child；
among the children of his age“在他同年龄的孩子中间”说明要用复数。