问题
选择题
It is dangerous to allow the children who are ________ swimming in the river.
A．enough old to go
B．not old enough to go
C．not enough old to go
D．not old enough going
答案
答案：B
考查enough的位置。首先否定词not应跟在be动词后面，故排除A；enough修饰形容词应放在形容词的后面，故排除C；enough to足够…以至于…，不定式做结果状语。故选B。