Trees of this kind are so __ that they can been seen everywhereA usual B ordinary C normalD common选什么?为什么?

this kind of trees is/are rare?主语是kind 还是trees,谓语动词应该用单数复数? This?animal is?ugly.A.a kind of;a kind of B.kind of;a kind of C.kind of;kind of D.kinds of;kind of 英语翻译短文:We eat food form trees.We get wood from trees to build our houses.We make paper from trees,too.On Arbor Day we plant new trees.Children help to do thework.Many trees begin their lives on this day.It's a kind of birthday for trees.N a kind of,this kind of,what kind of 它们是加单数还是复数 this （）animal is （）ugly.A、kind of kind ofB、a kind of a kind ofC、kinds of kindofD、kind of akind of 选哪个为什么呢? books of this kind the kind of this book 与a book of this kind 的区别 The job is very interesting but_____dangerous.A:of kindB:kind of C:a kind of D:this kind of People like _animals because they are _cute A.kind of,kindof B.kind of,this kind of, this is a kind of what it is this kind of paper_______very soft A feel B feels This kind of pen looks ( ).A.niceB.nicelyC.beautifullyD.well this kind of cloth (treated with) a chemical It's kind of late There is a kind of snake in this area kind of clever play with her friends kind oIt's kind of late There is a kind of snake in this area kind of clever play with her friends kind of a kind of以上翻译成中文 是this kind of apple还是 this kind of apples? shirts of this kind 和 this kind of shirts This kind of machine____cutting paper. This is kind of life