Question

写出下列数字的基数词和序数词.

1.2.3.4.8.9.12.16.20.31.

Answer 1

答案：

1   one --first

2   two--second

3   three--third

4   four fourth

8   eight  eighth

9   nine--ninth

12  twelve--twelfth

16  sixteen--sixteenth

20  twenty twentieth 

31  thirty-one -- thirty-first