ⅰ.单词拼写
1．the boy had been operated on and had to take only liquid (液体) food.
2．they did the last stage (阶段) of their journey on foot.
3．the windows of the bathroom have been clouded up because of the steam (蒸汽)．
4．we have a special department (部门) devoted to designing the best advertisement for your company.
