It's a Bird,It's a plane,It's a Sign of Spring

It's a Bird,It's a plane,It's a Sign of Spring 请教It's a sign of affection是什么意思? It's a bird.的上一句 it's hand make a paper plane It's a ____colder in spring It's the Spring Festival,and it's a very b______l time of Ch 改正错误；Who‘s that It‘s a bird It's a piece of a.It’s made of It's a piese of it's a bird.it lives at the south pole.it's It's like a bird ,but has no feather.It's like a dragonfly,b