选C
enough要放在形容词或副词后面,故排除A,B
修饰行为动词"work"用副词"carefully",故排除D
He didn't pass the exam because he didn't work( ).
He didn't pass the exam because he didn't work( ).
A.enough careful B.enough carefully C.carefully enough D.careful enough
A.enough careful B.enough carefully C.carefully enough D.careful enough
英语人气：349 ℃时间：2019-08-19 22:51:28
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