CHIA DẠNG ĐÚNG CỦA ĐỘNG TÙ TRONG NGOẶC 15. The dog (wag) his tail whenever he (see) me. 16. What you (do)when I (ring) you last night? 17. When his father (die)? - I (not know) when he (die). 18. Where the man wearing a red hat (sit) last night? 19. He fell asleep when he (do) his homework. 20. Be quiet! The teacher (be) angry. 21. John (watch) TV at 8.00 last night. 22. Her sister (prepare) her lesson while she (watch) TV? 23. Don't speak until someone (ask) you. 24. Sometimes I (get) up before the sun (rise). 25. Yesterday thieves (break) into the house and (steal) a lot of fur coat while the guests (dance). 26. They (play) computer games when their mother (go) home yesterday.