C: 1.Do you have to be ; 2.will have to go ; 3.I had to get up ; 4.Did you have to wear ;
5.Has to go to school ; 6.Won't have to go to; 7.does he have to start .
D: 1.musn't ; 2.don't have to pay; 3.musn't; 4.doesn't have to; 5.musn't. .
E: 1.I don't think i will travel a lot in my life; 2.I think i will leave in a foreign country ;
3.I think i will get married ; 4.I think will have children ; 5.I don't think i will be rich. .
F: 1.In 2050 people may discover a lot more species of animals ; 2.In 2050 people may live in peace with aliens .
