Some students are so that they often make mistakes in their homework.
A. carful
B. serious
C. careless
D. successful
网友回答
A. carful
B. serious
(答案→)C. careless
D. successful
解析：根据语境可知此句的含义是有些学生这么粗心，以至于在家庭作业上经常犯错误。考查的是固定短语so…that这一句型结构，so的后面要求跟形容词或副词。因表示的是学生粗心，故用形容词，有选择项的提示可知选择C。