His father began to work _____ he was seven years old 带讲解

题目

His father began to work _____ he was seven years old 带讲解
A.as old as
B.as early as
C.since
D.while

答案

B
当他爸爸七岁的时候就去工作了
这里表示他爸爸很年轻的时候就去工作了
如果用since 的话,要改成His father had begun to work