Nobody knows what is going ___ his mind.

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 (through) his mind.
没人知道他心里正在想些什么.
go through his mind,他心里想什么.