No, this isn't.This isn't a pen.That:That is a pen.Is that a pen?Yes,that is.No,that isn't.That isn't a pen.These:These are pens.Are these pens?Yes,these are.No,these aren't.These aren't pens.Those:Those are pens.Are those pens?Yes,those are.No, those aren'...
英语单词造句 急啊！！！！！！高分！！！
