春寒料峭3級2016-11-15 回答

twenty

twenty-one

twenty-two

twenty-three

twenty-four

twenty-five

twenty-six

twenty-seven

twenty-eight

twenty-nine

thirty

thirth-one

匿名使用者6級2016-11-14 回答

20 twenty

21 twenty-one

22 twenty-two

23 twenty-three

24 twenty-four

25 twenty-five

26 twenty-six

27 twenty-seven

28 twenty-eight

29 twenty-nine

30 thirty

31 thirty-one

匿名使用者3級2016-11-14 回答

分別是：

20 twenty

21 twenty-one

22 twenty-two

23 twenty-three

24 twenty-four

25 twenty-five

26 twenty-six

27 twenty-seven

28 twenty-eight

29 twenty-nine

30 thirty

31 thirty-one