问题描述：
Nobody knows what is going ___ his mind.
Nobody knows what is going ___ his mind.He is standing there with a strange
expression.
A.across B.on C.through D.around
Nobody knows what is going ___ his mind.He is standing there with a strange
expression.
A.across B.on C.through D.around
问题解答：
我来补答展开全文阅读