【题目】It is ________ his tremendous enthusiasm and devotion that the old teacher is respected by all his students.
A.on account of
B.with regard to
C.in terms of
D.in reference to

【答案】A
【解析】句意：是这个老教师极大的热情和奉献精神使他赢得了他所有学生的尊重。on account of由于，因为；with regard to至于，关于；in terms of就……而言；in reference to关于，至于。A项符合语境。