doesXiaomingknowwhyhisperformancedecline?ishismotheractionalittlearbitary.
firstypickupthetestpaper,findoutthelostpoints,askwhyxiaominglostthosepoints,findouttherootcause,ifthoselostpointsoccuredbecauseofhiscarelessnessinthelearning,hemaysuspendlisteningtotheMP3whilelearning.ifthereasonsareothers,thissolutionsmaynottakeanyeffect.
Xiaomingmaytrytoseethisproblemfromhismother'sview,shewishXiaomingtobemoreconcentrateduponthelearning,notinterruptedbymusic,toimprovelearningeffect.
themotherandsonmaymakeanagreement,thatifxiaomingcouldachievegoodperformanceinnexttest,momshallreturnMP3toxiaoming,andfromthenon,xiaomingmayenjoythemusiconlyattherestintervalsoflearning.