题目内容：

Sorry,this math problem is a bit difficult for me.I need to c____ it again.

优质解答

checkSorry,this math problem is a bit difficult for me.I need to _check_ it again.这道数学题有点难,我要再查一遍.changeSorry,this math problem is a bit difficult for me.I need to _change_ it again.这道...