英语——连词成句如题、.1.expensive/is/It/buy/planes,/model/to/so/hardpa

1.It is very expensive to buy model planes,so I use hardpaper .
买飞机模型很贵,所以我用硬纸.
2.I borrowed some books about making model planes from the library.
我从图书馆借了几本关于制作飞机模型的书.
3.From now on,I have to study hard and read a lot about engineering.
从现在开始,我不得不努力学习并且阅读大量关于机械的书.

1. It is very expensive to buy model planes,so I use hardpaper (to make one)
2. I borrowed some books about making model planes from the library.
3.From now on, I have to study hard and read a lot about engineering.