Chia động từ ở thì quá khứ đơn hoặc quá khứ hoàn thành: 11. It (rain)____________________ all summer, so the grass was completely dead. 12. When he (arrive)____________________ at the party, Julie had just left. 13. After arriving home, I realised I (buy)____________________ any milk. 14. The laundry was wet - it (rain)____________________ while I was out. 15. William felt ill last night because he (eat)____________________ too many cakes. 16. Keiko (meet)____________________ William last September. 17. First I tidied the flat, then I (sit)____________________ down and had a cup of coffee.18. John (play)____________________ the piano when he was a child, but he doesn't play now. 19. When I opened the curtains the sun was shining and the ground was white. It (snow)____________________ during the night. 20. When Julie got home from her holiday, the flat was a mess. John (have)____________________ a party.