, I lost heart in English learning, but my teacher often said to me, "Keep on studying hard ,

and you'll succeed              ."  [ ]

A. At one time; in time                  

B. At one time; on time  

C. At a time; in time                    

D. At a time; on time

心理学家把如急躁、莽撞、情绪变化快的气质类型叫做（）

A．胆汁质

B.抑郁质

C．粘液质

D.多血质