____is known to us all is that the old worker, ____life was hard in the past, still works hard in his seventies.
| A．As, whom | B．What, whom | C．It, whose | D．What, whose |
I don’t know the reason _______ you were absent from the meeting, and I am not sure whether someone will tell me the reason _______you haven’t told me.
| A．why; that | B．that; why | C．because; why | D．of which; that |
Don’t talk about such things ______you are not sure of, ______ is what you should keep in mind.
| A．as; which | B．as; that | C．that; as | D．what; where |
—I still remember my wonderful stay there ________ I worked in the distant mountain village.
—But everything is changing so fast, the persons there aren’t the ones ______they used to be.
| A．when; that | B．where; whom | C．during which; who | D．which; what |
He went out to play football, leaving his homework _________.
| A．to unfinish | B．to be unfinished | C．unfinishing | D．unfinished |
All her time __________ experiments, so she has no time for films.
| A．devoted to do | B．devoted to doing | C．is devoting to doing | D．is devoted to doing |