1.We always have a bed ready in the spare room in case visitors arrive ………unexpected ( bất ngờ )………………. (expect)
2. In Australia, a …………tropical ( adj/ nhiệt đới ) ……………. storm is known as a cyclone. (tropic)
3. The wind has ………abruptly ( adv/ đột ngột )………………. changed the direction. (abrupt)
5. …………tidal ( adj/ thủy triều )……………. waves are the result of an abrupt shift in the underwater movement of the Earth. (tide)
6. Thousands of people were ………disastedly(adv)………………. killed by earthquake in the morning. (disaster)
7. Strong storms often reach …………coastline ( bờ biển )……………. areas in summers. (coast)
8. The most …………dangerous ( adj/ nguy hiểm )……………. earthquake which killed about 150.000 people in Japan occurred in 1923. (danger)
9. I’m afraid of the volcanoes that show a violent ………eruption(phun trào )………………. (erupt)  
10. The ……………destruction (n/ sự hủy diệt )…………. of their house left them no place to live. (destroy)
11. Is the eruption of Mount Pinatubo the world’s largest ever …………volcanic ( adj) ……………. eruption? (volcano)
12. This research will …………enlarge ( mở rộng )…………. our knowledge of the disease. (large)
13. Do you believe in their ……………prediction ( sự dự đoán )………….? (predict)
14. A tornado lifted a baby into the air and put him down …………safely……………. 100 meters away. (safe)
15. You should buy some …………canned ( đóng hộp )……………. food before a typhoon. (can)
16. Because of the …………stormy (adj)……………. weather, sailing is not allowed in this part. (storm)
17. My father has studied  ………behavioral( hành vi )…………science for over 20 years. (behave)
18. The building was ………extendly ( adv/ kéo dài )………………. damaged by the fire. (extend)
19. Our ……………scientists ( các nhà khoa học )…………. have not warned our fishermen about the Chanchu typhoon carefully. (science)
20. Smoking is ………damaged………………. to your health. (damage)
21. The flood in the Mekong delta last year was ………disastrous ( adj/ thảm hoạ ) ………………. to the country. (disaster)
22. The number of main craters may be about twenty-five, but there are very many small .…………eruptive ( adj/ phun trào)……………. cones on the flanks of the old volcanoes. (erupt) 
23.  It was almost entirely rebuilt after a ………destructive ( adj) ………………. fire in 1834. (destroy)
24. The killing of any .…………endanger (adj)……………. species except in defense of a human life is a crime. (danger)
25. The scientists now believe that all …………volcanism……………. can produce two kinds of lightning during an eruption. (volcano)