No one can deny that it is ______ that many more residents could have been injured if the building had fallen at midnight.

---- Are you feeling _______ better today?---- No, I’m feeling _______ worse.

To win in these areas, the firm needs a sustainable __________ advantage.

Our English teacher is a _____ and strict man.

.In our school, there is a rule that anyone shouldn’t play computer games during the ______ working time.