问题: 选择
he began to work( )he was five years
old.
A as old as B as early as
C since D while
请说明理由
解答:
选B.
as old as (年龄)达到...
as early as (时间)早到...
since 自从... 多与完成时连用
while..当...时,在...过程中(可看作是一个短时间状语)
而题中开始工作需要一个点时间状语。
“它早在五岁时就开始工作了。”
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