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-- When did they get down to the job?

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-- When did they get down to the job?
-- ____.
A.Until they left
B.Till they arrived
C.Since they finished it
D.Not until they turned to me
这道题怎么回事 我见过一些解答 很牵强
-- When did they get down to the job?
D 对,
A:他们什么时候开始这项工作的?
B:等他们向我请教后才开始的
not...until 表示:直到.才.
A,B是表示一段时间的.
c显然不对.