--- how was your weekend?
---- Great! It was my grandfather’s birthday. We enjoyed ourselves.
A. seventy
B. seventieth
Cthe seventieth
D. seventeenth
网友回答
A. seventy
B. seventieth
C. the seventieth
(答案→)D. seventeenth
解析：本题难度适中，seventieth第七十的，seventy是七十，seventeenth是第十七的，答案选D，意思是爷爷的70岁大寿。