1) 1 be 2 might 3 may 4 can't be 5 need 6 must 7 can't 8 must 9 might need
2) 1 necessary/obligatory 2 prohibited 3 necessary/obligatory 4 not necessary 5 not necessary 6 not necessary 7 necessary/obligatory
3) 1 get 2 sort 3 put 4 put 5 drop 6 look 7 talk
5) Correct order: 7, 5, 1, 6, 8, 3, 4, 2, 9