＿＿＿about the student,the teacher called his parents to find out something＿＿＿his absence from class.
A.Concerning,concerned B.To concern,concerned
C.Concerned,concerning D.Concerned,to concern
參考答案:a
Concerning about the student,...
担心,牵挂这学生
用ING是因为 主语做某事并伴随着另件事,所以用ING
concerned 和...有关
他的不来上课是过去发生的,不来上课的理由自然也是用ED