问题
选择题
—Peter, how old is your father this year?
— _____. And we just had a party to celebrate his ______ birthday last weekend.
A．Fortieth; forty
B．Forty; fortieth
C．Fourty; Fourtieth
D．Fortieth; fortieth
答案
答案：B
题目分析：句意为：---彼得，你父亲今年多大年纪了？---四十岁。我们上周举行聚会庆祝他的四十岁生日。表示年龄大小用基数词，表示生日时应用序数词。故选B。