They took part in Mary's___birthday party yesterday.

问题描述:

They took part in Mary's___birthday party yesterday.
A.thirty-five Bthirtieth-five C.thiry-fifth D.the thirty-fifth

C.thiry-fifth
首先搞清楚,35岁表达方法——thirty-five.本题考察的是三十五岁生日,也即第三十五个生日,故用thirty-fifth