20. The heating system in this house (work, works, working) very
21. Ann (look, looks, looking) sad in this photo.
22. (teaches, music, she, us )
teaches us music.
she
23. (teeth, you, must, your, clean, keep)
You.
24. (white, painted, the door, he)
25. (his friends, he, his new bicycle,
showed)