Mr.Brown sat back -----a smile -----his face. a.with,on b.with,in c. for ,on d.with ,at
问题描述：
Mr.Brown sat back -----a smile -----his face. a.with,on b.with,in c. for ,on d.with ,at
答
A
with a smile on his face脸上带着微笑
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答
a.with,on