---why didn't Mona come to the party that

---why didn't Mona come to the party that day?---I ______her to the party that day,______.A.would have invited;but i didn't know her well vited;however,she failed为什么选B不选A

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"toattendit"."failed"means"notsucceed"while"failtodo"means"benotabletodo..."第二选项缺少了"toattendit".这个不定式。"failed"意思是失败而"failtodo"意思是“没做成”其他的没问题