问题
选择题
--- how was your weekend?
---- Great! It was my grandfather’s _______ birthday. We enjoyed ourselves.
A．seventy
B．seventieth
C． the seventieth
D．seventeenth
答案
答案：D
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。