问题
选择题
I t doesn’t matter if _______ boys play basketball too much instead of watching TV.
A.sixteen-years-old
B.sixteen-year-olds
C.sixteen year old
D.sixteen-year-old
答案
答案:D
考查复合形容词。sixteen-year-old十六岁的,连字符之间的单词用单数,故选D。