词组：
1.陷入深思
be lost in thought
2.返回取某物
fetch sth.
3.走过去看一看发生了什么
go and have a look at what is going on
4.与某人同住一个房间
share a room with sb.
5.使劲移开那块大石头
to move the big rock with great efforts
6.背着一个沉重的包
carry a heavy bag on one's back
7.去吃饭
to go and have meal
8.背负沉重的课业负担
to bear a heavy load of homework
9.约某人
invite sb.
句子：
1.接下来车便撞上了过马路的老人.
Afterwards, the car knocked down the old man who was crossing the road.
2.我们的图书馆在另一边原来是操场的那个地方.
Our library was located in the place which used to be the playground.