问题补充：
There are about five people in the town, mainly the old and children.
A. hundred
B. hundreds
C. hundred of
D. hundreds of
答案：
(答案→)A. hundred
B. hundreds
C. hundred of
D. hundreds of
解析：此题考查名词的量。确切数量常用数词+hundred/thousand/million/billion+名词的复数形式；不确切数量常用hundreds/thousands/millions/billions + of+名词的复数形式.
