What's in it 其中代词 it 指什么?

What's in it 其中代词 it 指代：（ ） what's it like in summer?中的it指什么? what's in it? what's in it what's in it 翻译 1.It's heavy.what's in it? It's hot.It's in the sky.It begins with letter“s”.What is it What's In It For Me 歌词 What's this in English?It's____egg what's in it for them 是什么意思 what does it like in summer?It“s hot.(改错! Look at this. It’s a pencil box. It’s orange. What’s in it?