问题补充：
The kid isn old enough to go to school.
A. is not too young to go to school
B. is too young to go to school
C. is so young that he can go to school
D. can go to school
答案：
A. is not too young to go to school
(答案→)B. is too young to go to school
C. is so young that he can go to school
D. can go to school
解析：句意：这个孩子年龄太小了，不能去上学。isn old enough to go to school年龄不是足够大的，以至于不能去上学，相当于too…to太…而不能，故选B
