About 50 policemen surrounded the murderer.改为被动语态About 50 policemen surrounded the murderer.=The murderer____ ____ ___about 50 policemen.
问题描述：
About 50 policemen surrounded the murderer.改为被动语态
About 50 policemen surrounded the murderer.
=The murderer____ ____ ___about 50 policemen.
答
was surrounded by
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答
was surrounded by