问题
选择题
Do you think _________ should be allowed to drive?
A．sixteen-year-old
B．seventeen-year-olds
C．fifteen-year-old
D．eighteen-years-olds
答案
答案：B
考查数词的用法。句意“你认为17岁的人应该被允许开车吗？”“数词-单数名词-形容词”作定语，例如，“一个3岁大的男孩”a three-year-old boy。题目中没有名词，因此，这个短语本身加s表示复数含义。故选B。