I believe I could beat you at chess__day of the week.A.someB.anyC.eachD.every 原因

I believe I could beat you at chess__day of the week.A.someB.anyC.eachD.every 原因
I believe I could beat you at chess__day of the week.A.someB.anyC.eachD.every 原因

I believe I could beat you at chess__day of the week.A.someB.anyC.eachD.every 原因
BELIEVE 后面的事情是还没有发生的,我相信本周的某一天我将在国际象棋中击败你.不确定是哪一天所以用SOME.