While ( )in Scotland ,he made friends with the natives there.选择答案A.working B.worked C.he works D.he is working 为什么B不对啊

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While ( )in Scotland ,he made friends with the natives there.选择答案A.working B.worked C.he works D.he is working 为什么B不对啊

While ( )in Scotland ,he made friends with the natives there.选择答案A.working B.worked C.he works D.he is working 为什么B不对啊
While ( )in Scotland ,he made friends with the natives there.
选择答案A.working B.worked C.he works D.he is working
为什么B不对啊

While ( )in Scotland ,he made friends with the natives there.选择答案A.working B.worked C.he works D.he is working 为什么B不对啊
选A
while引导的时间从句在与主句(he made friends with the natives there)主语一致的时候,其主语和be动词可以省略,原句是While he is working in Scotland,he made friends with the natives there.

这里while是介词,后面要接ing形式,不要被句子的过去时蒙骗。