—These days he has stayed up late into night in order to get good marks in the following m

问题补充：

—These days，he has stayed up late into night in order to get good marks in the following monthly test.

—Its no that he seems tired and asleep in class every day.

A. wonder

B. problem

C. doubt

D. question

答案：

(答案→)A. wonder

B. problem

C. doubt

D. question

解析：考查名词辨析。句意：——这些日子他为了在接下来的月考中得到好分数熬到很晚。——难怪他每天看起来都很累，上课时好像都能睡着。Its no wonder that...“难怪……”，符合语意。