a kind of pet还是a kind of pets,为什么?
a kind of pet还是a kind of pets,为什么?
a kind of insect还是a kind of insects?为什么
this kind of pets are popular 还是 this kind of pet is interes
what kind of pet为什么是pet不是pets,这里都是单数吗
kind of, a kind of, kinds of
a kind of,this kind of,what kind of 它们是加单数还是复数
kind of+形容词,a kind of+名词 都是kind of 的词组为什么用法不同?
a kind of
a kind of同义词
one of a kind
a kind of 用法?
"A groovy kind of