---How long has your brother been working in this factory?-he dropped from school in 20

发布时间：2020-08-17 08:13:05

---How long has your brother been working in this factory?
---    he dropped from school in 2010.
A. When
B. Until
C. Since
D. Before

网友回答

A. When
B. Until
(答案→)C. Since
D. Before
解析：考查连词。A当……时候；B直到；C自从；D在……之前。句意：——你哥哥在这家工厂工作了多久？——自从2010年他从学校辍学。故C正确。
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