[知 识 梳 理] Ⅰ.核心单词 单词拼写 1．There are more than 200 children in this ________(幼儿园)，most of whom come from the nearby villages. 2．She ________(不知怎么地)got lost on her way home. 3．He didn't mean to，but he ________(删除)the files by accident. 4．Our boss urged on us the ________(重要性)of punctuality. 5．You have never been a ________(招待员)before and do you think it is a challenge for you?