Bob__here to see you and he__a note on your deskAhas come;had leftBhas been;has leftChas come;leftDhas been;left

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Bob__heretoseeyouandhe__anoteonyourdeskAhascome;hadleftBhasbeen;hasleftChascome;leftDhasbeen;leftBob

Bob__here to see you and he__a note on your deskAhas come;had leftBhas been;has leftChas come;leftDhas been;left
Bob__here to see you and he__a note on your desk
Ahas come;had left
Bhas been;has left
Chas come;left
Dhas been;left

Bob__here to see you and he__a note on your deskAhas come;had leftBhas been;has leftChas come;leftDhas been;left
个人观点:D.has been;left
第一个空表示过去的动作对现在影响,并且强调完成,所以用“been”这个延续性动词,而后面的Left表示间的陈述,他把东西留下了,因为动作发生在过去,所以用leave的过去式left