it seem diffcult for him to decide(——)to leave or stay填空

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it seem diffcult for him to decide(——)to leave or stay填空
it seem diffcult for him to decide(——)to leave or stay填空

it seem diffcult for him to decide(——)to leave or stay填空
whether 是否

应该是whether吧

填whether whether ……or 是否

whether...or