问题补充:
Tell the boy the news. He is to understand it.
A. enough old
B. enough young
C. old enough
D. young enough
答案:
A. enough old
B. enough young
(答案→)C. old enough
D. young enough
解析:old年老的,旧的;young年轻的;enough足够的,做副词修饰形容词时,一般放在被修饰词的后面。句意:告诉这个孩子这个消息。他已经足够大,能理解了。结合语境可知选C。