______the operation successfully,the doctors once again had

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______the operation successfully,the doctors once again had a meeting.
A.performing B.To perform C.Performed D.Perform
在这里,TO perform 是表示为了做一个成功的手术吗?那为什么后面用过去式

因为这句话使用逗号隔开的,所以这是一个简单句,一个简单句中只能有一个谓语动词,后面已经用过去式had作谓语动词了,所以第一个空只能选择非谓语动词.
这里选择B动词不定式做目的状语.
翻译：为了手术能够成功,医生们再次开了一个会

______the operation successfully,the doctors once again had The doctor p_______ the operation successfully. the operation was completed successfully是什么意思 1.After ten hours' operation,the doctors managed to ____the the doctor suggested the man have an operation at once the difference between "ONCE MORE"& "AGAIN"! how is the operation going after five hours' work doctors an The building had once known _____. The city had once known as prosperity For The Heart I Once Had 歌词改写英语病句谁知道下列的病句怎么改写?Rita mentioned the operation she had had once again,once and again,again and again的区别