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
His father began to work _____ he was seven years old 带讲解
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
A.as old as
B.as early as
C.since
D.while
英语人气：679 ℃时间：2019-12-18 07:48:26
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