Ⅰ.根据句意和首字母或汉语提示写出单词
1Our ______ (以前的)teacher was kind to us.
2Reading ______(理解)ability is important in English study.
3The girl used to be ______(尴尬的)in public places，but now she is used to making a speech.
4He simplified the ______(说明)that the chidren could understand them.
