________ is known to us all is that the famous author, for ________ life was hard in the past, still works very hard in his eighties.
A．What; whom B．As; whom C．It; whose D．What; whose
________ is known to us all is that the famous author, for ________ life was hard in the past, still works very hard in his eighties.
A．What; whom B．As; whom C．It; whose D．What; whose
A