问题补充:
He is not to do his homework., which makes his parent worried
A. careful enough
B. enough careful
C. carefully enough
D. enough carefully
答案:
(答案→)A. careful enough
B. enough careful
C. carefully enough
D. enough carefully
解析:carefully副词,细心地;careful形容词,细心的,enough修饰其它词语时,一般放在被修饰词的后面。联系前文系动词is,可知本句是形容词作表语,故选A。