Ⅰ.根据括号内提示或首字母完成单词
1．The public want to know the ________(身份) of the killer.
2．An ________(office) of the local government called to see him.
3．The Titanic sank on its maiden ________(航行)．
4．There are many differences between British and American ________(spell)．
5．She lays a lot of emphasis on the u________ of prepositions.
