问题
选择题
Fred, who had expected how it would go with his daughter, had a great worry ______ his mind.
A．in
B．on
C．with
D．at
答案
答案：B
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Fred, who had expected how it would go with his daughter, had a great worry ______ his mind.
A．in
B．on
C．with
D．at
答案：B