Esercizio 2 - Continua le serie

e.g. twenty, twenty-one, twenty-two, _twenty-three_, _twenty-four_

1) fifty-one, fifty-five, fifty-nine, _______, ________

2) eighty-seven, eighty-six, eighty-five, _______, ________

3) thirty, thirty-five, forty, ______, ________

4) ninety-seven, ninety-eight, ninety-nine, _________, _________

5) sixty-three, sixty-five, sixty-seven ________, _________

6) forty-three, forty-four, forty-six, _________, _________

7) sixty, seventy, eighty, __________, _________

8) seventy-three, seventy-two, seventy-one, _________, __________

9) twenty-eight, twenty-six, twenty-four, ___________, __________

10) eighty-two, eighty-three, eighty-five, __________, __________