Give the correct form of the words in brackets: Tornadoes are ... storms which pass ... before thunderstorm (shape/land)

give the correct form of the words in brackets
1 Tornadoes are ............... storms which pass .......... before thunderstorm(shape/land)
2 The........... cannot predict exactly when there is an earthquake (science)
3 the.............. of volcanoes are very strong(erupt)
4 there will be no food ................ during storms(avail)
5 we need ........... workers to find the missing in the explosion(experience)
6 I still remember the .......... during the time of the war(evacuate)
7 The............. is better can cure(prevent)