—I’m afraid you missed a fantastic lecture yesterday. How come you were absent from it?—If you _______ know, I asked for a day off and visited a relative of mine in hospital.
.Although it had been______ struggle for him to finish the experiment, he enjoyed the result with________ satisfaction.
― Did you go to the 2010 Shanghai World Expo? ― Yes, my father took me there. It was really __________!
— What is the model plane like? — Well, the wings of the plane are_______ its body.
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.