Choose the best answer to complete each of the following sentences.
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. fallrain
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