What extreme weather phenomena are the most dangerous? why? )9 класс

1) i bought a new dress yesterday. 2) they didn,t win  the game. 3) who is the cleverest pupil in the class? 4) we went to the funfair two days ago. 5) kathy is the prettiest girl in the school. 6) did you meet  paul at the hospital yesterday? 7) liz wrote a letter to ken a week ago. 8) ricky was the strongest  boy in his class. 9) the boys rode a camel at the zoo last summer. 10) my brother tom didn,t swim for his school team. 11) kim met brad pitt last month. 12) i rode a horse for the first time last saturday. 13) kevin is the best pupil in the class. 14) mary and julie went to a concert last night. 15) jack is the strongest boy in the room. 16) cindy bought a new jacket yesterday. 17) did john win  the game? 18) who is the loudest student in the class? 19) we ate chips and burgers for dinner. 20) they didn,t see  any dinosaurs in the museum.