Thedoctorhasdone________helpthepa

发布时间：2020-07-26 10:22:30

The doctor has done ________ help the patient.A.what he couldB.what he could toC.all which he would do toD.all what he could to

网友回答

B解析【巧解导析】从句中省略了谓语动词do，to help…为目的状语，故A不正确；all为先行词，关系代词只能用that，故C，D也不正确．
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