He is the one of good____(swimmer；swimmers)in our class.还要原因
问题描述：
He is the one of good____(swimmer；swimmers)in our class.
还要原因
答
He is the one of good swimmers in our class.
one of 后跟名词复数 “....之一”
答
He is the one of good_swimmers___(swimmer；swimmers)in our class.
他是我们班好的游泳人中的一个
one of+名词 名词要用复数 .的一个
希望能够帮到楼主