Many a professor _____ looking forward to visiting Germany now. Many scientists _____ studied animals and plants in the last two years.
Why not try another way _______ you may do your experiment better and more quickly?
— Can you imagine what is Jack doing now? He is playing football outside while everyone else is busy in class! — He his homework, I think.
—Why did you stop writing? — I _____ my writing paper.
Now that he that he had stolen the money, you should forgive him.
what his parents think, he is leaving home for a new job in a big city.