重点讲解：
1. be afraid of 害怕的；恐惧的；
例句：Some children are afraid of the dark.
有些小孩怕黑。
2. count on 指望；依靠；依赖；
例句：That was the only thing they could count on.
那是他们唯一依靠的东西。
3. of course （表示通常、显见或众所周知的事实）当然，自然；
例句：Of course there were lots of other interesting things at the exhibition.
当然，展览上还有很多其他有趣的展品。
4. like doing sth. 喜欢；喜爱；
例句：I just didn't like being in crowds.
我就是不喜欢呆在人多的地方。