Question

ПОМОГИТЕ ПОЖАЛУЙСТА 1,2,3 задание!!! Срочно

Answer 1

1
  1.Must
  2.Can't
  3.May
2
  1.do my best
  2.do...good
  3.do without
  4.do some work
  5.do exercises
3
  1.because
  2.that's why
  3.but