根据括号内所给汉语写出单词的正确形式。

1. Sunday is the              (第一)day of the week.

2. Can you             (写)them on the blackboard?

3. Li Dong often              (练习)his spoken English in or out of the class.

4. There are two small            (城市) near my hometown (家乡).

5. Don't               (关闭)the window,it's very hot.