- David how old is your father this year? - ———— And we just had a special party for his

问题补充：

- David, how old is your father this year?

- ———— And we just had a special party for his birthday last weekend.

A. Fortieth; forty

B. Forty; forty

C. Forty; fortieth

D. Fortieth; fortieth

答案：

A. Fortieth; forty

B. Forty; forty

(答案→)C. Forty; fortieth

D. Fortieth; fortieth

解析：考查数词.句意:戴维德,你父亲今年多大了?_四十岁。上周我们刚刚为他的第四十个生气举行了一个特别的聚会。表示某人多大，用基数词，为某人过第几个生日用序数词，故选C