_____ is known to us all is that the old scientist, for _____ life was hard in the past, still works very hard in his eighties.
She ________ someone, so I nodded to her and went away.
I think _______ is no need for us to comment on his action: it speaks for itself.
----- It’s too strange that these people should laugh when their relatives die. ----- That is the local custom ______ the seventeenth century.
I lent him ten magazines, ____ are more wonderful than you can imagine.
It is silly of me _____ all eggs in one basket. That is the worst mistake I have made.