根据上下文意思或首字母提示，写出合适的单词。

1. Usually students don't have the lesson in the classroom with their teacher. They often run, and play

    ball games in the playground. This is a           lesson.

2. Usually students don't speak Chinese in this subject. They often say “ABC…” and do some reading

    and copying. This is an____    lesson.

3. They are s            days in a week.             is the last (最后的) day of a week.

4. Yang Ling likes s_____ and d            very much, so she likes music lessons.

下面是国有企业职工的收入，按劳分配收入所得是：（   ）