30. The woman sitting next to me on the plane was very nervous. She ___________ before. A. hasn't flown B. hadn't flown C. didn't fly D. doesn't fly 31. The earth’s weather is _____________ and we don’t know what will happen to us. A. dangerous B. serious C. predicted D. mysterious 32. Man has spent years and years trying _____________weather patterns but it is still an inexact science. A. predicting B. to predict C. to predicting D. to have predicted 33. A drought occurs when a region receives consistently below average _____________ A. falling rain B. rain falling C. rainfall D. fall rain 34. When we ___________back to our home village last month, it ____________ so much. A. had come - changed B. came - had changed C. came - has changed D. had come - has changed 35. She _____________ in that town for 20 years by the time that historic earthquake A. had live - occurred B. has lived - occurred C. had lived - occur D. had lived – occurred 36. Some tents _____________ so that children and old people could sleep in. A. was set up B. were set up C. set up D. setted up 37. People in Japan _____________ how to survive in an earthquake. A. have been taught B. are taught C. were taught D. had been taught 38. Exactly 5 people got stuck and _____________ in that fire. A. was death B. was died C. dead D. died 39. An earthquake is the _____________ a sudden release of energy in the Earth’s crust. A. cause by B. consequence C. result from D. result of