___of his name ,we had a lot of trouble in finding the patient.A not informed B not having informed C not having been informed D having not informed

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___of his name ,we had a lot of trouble in finding the patient.A not informed B not having informed C not having been informed D having not informed

___of his name ,we had a lot of trouble in finding the patient.A not informed B not having informed C not having been informed D having not informed
___of his name ,we had a lot of trouble in finding the patient.
A not informed B not having informed C not having been informed D having not informed

___of his name ,we had a lot of trouble in finding the patient.A not informed B not having informed C not having been informed D having not informed
选 C
Not having been informed of his name,we had a lot of trouble in finding the patient.
由于不知道那位病人的名字,我们很难找到他.

正确答案是C

你好。这道题出得不好,因为A和C都是正确的选项。A和C都是分词结构做原因状语,变成从句结构就是:
As we hadn't been informed of his name ,we had a lot of trouble in finding the patient.

选C
首先根据had可知事情发生在过去,而前面发生的事情造成了后面的结果,所以用完成时,排除A,
其次,be informed of是固定用法,听说,知道。所以先C

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