重点讲解：
1. be scared of
惊恐的；恐惧的；害怕的；
eg. I was scared of slipping on the ice.
我害怕在冰上滑倒~h73D;cBcrA。
eg. Most people are scared of radiation.
一般人对辐射都存有恐惧YFhVdb.-@k2ef。
2. used to do sth.
过去常常；过去曾；
eg. We used to be rushed off our feet at lunchtimes.
以前我们在午饭时间会忙得不可开交c9;TKJa*#,SspqdV。
eg. He used to go about in a black cape.
他以前常穿一件黑披风r,P!%H~X_Tes[。
3. whether or not
无论；是否；
eg. Whether or not he realised the fact was neither here nor there.
他是否认识到事实真相无关紧要*gDa+fpa)rAxYf。
eg. It's up to you to decide whether we buy this set of furniture or not.
由你来定我们是否买这套家具2g%8K~g~5(aD,jjh。