Only when 30 years old to learn English． [ ] A． was he; did he begin B． he was; he began C． he was; did he begin D． was he; he began 题目和参考答案——青夏教育精英家教网—

题目内容

Only when ________ 30 years old ________ to learn English．

[　　]

A．

was he; did he begin

B．

he was; he began

C．

he was; did he begin

D．

was he; he began

答案：C

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