英语完形问题,so easy 的.急.

英语完形问题,so easy 的.急.you don’t know.These questions you couldn’t answer are relatively common in everyday 52 .” “ Then,smiling,he added,“ You will all 53 this course,but remember --- even though you are now college graduates,your education has just 54 .”With years passing by,people are beginning to 55 the name of this professor,but not the lesson he taught.52.A.practice B.study C.class D.job求52题解析.帮忙辨析一下abc的区别,急