问题补充:
He didn’t listen to the teacher carefully, , he couldn’t answer the questions.
A. for example
B. even though
C. as a result
D. as usual
答案:
A. for example
B. even though
(答案→)C. as a result
D. as usual
解析:句意:他没有仔细听老师讲课,结果,他不能回答问题。. for example例如;even though即使;as a result结果;as usual像往常一样。所以选C。