2个 与多个的 区别.
2个 一个,另一个,就是 one,the other,
多个,一个,另一个,其它所有,就是,one,another,others
如果选C,题目应该是：
( )--It seems that one of his three(or more) sons is a doctor.--That's right.And____are soldiers.
另外,2个表示所有用 both,多个用all.