用所给单词的正确形式填空。(5分)
（1）We would brush our         （tooth）twice a day．
（2）This book is the lightest and       （thin）of all the books．
（3）Jane       （get) up at 7:30 every day．
（4）She is          （good）than Alice at swimming．
（5）What's your          （friend）name?