Viết các câu sau thành câu hoàn chỉnh

1.are/classrooms/nice/very/our/and/new
2. at/teacher/teaching/us/is/our/maths/the/moment
3.are/playing/we /schoolyard/in/the /now
4.it/very/to/is/interesting/join/school/in/my/chess/the/club/in