________ is known to us all is that the old doctor, for ________ life was hard in the past, still works very hard in his late life. ( )(本题2.0分) A、 As; whom B、 What; whom C、 It; whose D、 As; whose

________ is known to us all is that the old doctor, for ________ life was hard in the past, still works very hard in his late life. ( )(本题2.0分)
A、 As; whom
B、 What; whom
C、 It; whose
D、 As; whose

出自：河南工业大学-大学英语（一）

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