根据句意从方框中选择合适的词，并用其适当形式填空：

1．Mr．Black has a daughter．Today is her ________ birthday．

2．The books are not Tom’s．They are those ________．

3．The little boy looks ________ at us after he sees his parents．

4．There are at ________ thirty-two classrooms in our school．

5．These Chinese ________ cost 50,000 yuan．