Question

Best wishes to you ________ birthday!

1. A.
   on your twelfth
2. B.
   on you’re the twelfth
3. C.
   in your twelfth
4. D.
   in you’re the twelfth

Answer 1

A
解析：
在生日那天用on，序数词前有物主代词时不用冠词the。