阅读下面短文。然后根据括号中所给汉语意思写出单词并用其正确形式填空。每空一词。

Dear Lingling,

    I'm happy to get your ____（邮件）. This is a ____（照片） of my new school. It's a nice school. There are ____（绿色的） trees everywhere. This is my classroom. It's very big. I'm in Class ____（五）, Grade Seven. There is a ____ （电脑）, a clock and some desks in it. That is a ____（图书馆）. There are many books in it. The playground is very big, ____（也）. We can play ____（棒球） with our friends. Mrs. Green is my English teacher. I like ____（她的） class very much.

    My phone ____（号码） is 879-7659. Please call me.

①两个钝角相等；

②等式两边加上同一个数或同一个整式，所得的结果仍是等式；

③今天天气很晴朗啊；

④三角形的内角和是180°．

读句子，给划线词换一个新词，句子的意思基本不变。

①他又拿来一支蜡烛，把两支一齐点燃。果然，小纸人、小纸马飞快地转起来……____

②这天晚上，茅以升特别高兴。____