is known to us all is     the old scientist, for whom life was hard in the  past, still works very hard in his eighties.
#70211
A
What; what
B
What; that
C
That; what
D
As; that
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_____his father had come, his face lit up.
#74080
A
Having learned
B
When he learned
C
Heating
D
When learning
. She asked the man _______ it was true he had been a soldier before.
#72655
A
whether; that
B
that; that
C
if; when
D
what; whether