____ is known to us all is that the old worker, for _____ life was hard in the past, still works hard in his seventies.
A.As; whom B.What; whose C.It; whose D.What; whom
____ is known to us all is that the old worker, for _____ life was hard in the past, still works hard in his seventies.
A.As; whom B.What; whose C.It; whose D.What; whom
B