问题补充：
Tony’s sister is to take care of the little baby.
A. careful enough
B. enough careful
C. enough carefully
D. carefully enough
答案：
(答案→)A. careful enough
B. enough careful
C. enough carefully
D. carefully enough
解析：考查enough的用法。enough修饰名词，放在其后面，如enough money, enough修饰形容词或副词，放在其前面，如old enough,文中的动词为be动词，故选形容词，所以选A
