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.