37．His uncle became engineer at age of 25． A．an,an B．a,the C．an:the——青夏教育精英家教网——

摘要：37．His uncle became engineer at age of 25． A．an,an B．a,the C．an:the

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His uncle became _______ engineer at _______ age of 25．

A．an；an B．a；the C．an：the

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