Thank you, Mr. Chen. I’m wondering how to the great help you gave me during my study this year.
A. pay back
B. keep back
C. hold back
D. look back
网友回答
(答案→)A. pay back
B. keep back
C. hold back
D. look back
解析：短语辨析。 A. 偿还；报答 B.留下；隐瞒 C.隐瞒；阻止D. 回顾。句意：谢谢你，陈先生。我想知道我如何报答你这些年我留学期间给我的巨大帮助。故选A。