—Jack is very clever and he studies hard as well.—No he always comes out first in the exa

问题补充：

—Jack is very clever and he studies hard as well.

—No he always comes out first in the exams.

A. answer

B. question

C. wonder

D. problem

答案：

A. answer

B. question

(答案→)C. wonder

D. problem

解析：考查名词。(It’s ) no wonder…难怪，不足为奇。句意：难怪他在考试中名列前茅。选C。