Question

【题目】The boy is not old enough to work in the field.
A.old enough not to
B.so young to
C.too young to

Answer 1

【答案】C
【解析】句意：这个男孩去田里工作，年龄还不够大。too……to……“太……而不能”可与not adj. enough to互换，其中“too…to”中形容词与not adj. enough to中形容词是互为反义词。故选C。