.— Dane hasn’t arrived yet. — ______? To my knowledge, he is a punctual person.
Some of the _______suspects refused to answer and kept their mouths shut.
I told you that you shouldn't waste your time playing the computer games,_____________?
If human beings had been a bit less greedy and cruel, more birds and animals _______dying out.
With a lot of difficult problems____________, the manager felt worried all the time.
--Was Tom there when you arrived? --Yes, but he___________ home soon afterwards.