Jack is good kind hard-working and intelligent. I cant speak too highly of him.A. As

问题补充：

Jack is good, kind, hard-working and intelligent. , I can speak too highly of him.

A. As a result

B. By the way

C. On the whole

D. In a word

答案：

A. As a result

B. By the way

C. On the whole

(答案→)D. In a word

解析：in a word(=in short)总之，简言之。本题是测试“过度词”，考生务必根据上下文的逻辑关系来选择适当的过渡词，使句子的意思前后连贯。