Give the correct form of the verb:
. We __________ soccer when it started to rain yesterday. (play)
18. They used to _______buffaloes when they lived in the countryside. (ride)
19. The Ao dai _______ the traditionnal dress of Vietnamese women for centuries. (be)
20. I _______ Ha Long Bay three times since I started working in Quang Ninh. (visit)
21. When my mother came home from word, I ___________ dinner. ( cook)
22. Jane ____________to school by bicycle every day . (go)