Question

15．这个男孩还没有到独立处理这样的难题的年龄．
The boyis not old enough to deal with such a difficult problem by himself．

Answer 1

分析 is not old enough to deal with such a difficult problem by himself．

解答 答案：is not old enough to deal with such a difficult problem by himself．
结合句意，表达的是客观是说用一般现在时，表达不够怎样去做某事用be not+adj+enough to do sth，主语the boy，故is，故is not old enough to，处理deal with，这样的难题such a difficult problem，by oneself独自的，故答案是is not old enough to deal with such a difficult problem by himself．

点评 not+adj．+enough to do sth是不够…而不能做某事 
too+adj．+to do sth．是太…以致不能做某事，其实两者可以互换!
例：He is not tall enough to catch the bird．=too short to catch the bird