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11. Her father's flight __________________________ at 8.30 next Sunday. (depart)
12. I think I __________________________ a strange sound outside the door one minute ago. (hear)
13. If I __________________________ Janet, I would never forgive John for what he has done. (be)
14. __________________________ disasters like earthquakes and floods can be devastating. (NATURE)
15. Next month, my school will hold an English Contest to __________________________ the Teacher’s Day. (CELEBRATION)
16. Tom __________________________ visited Mary at her parents' house. (OCCASION)