They ________ healthy and they _______healthy food.
—Be careful ! There is _____dog lying on the ground.—Thanks a lot.
— Do you know sound travels very fast? — Yes. But light travels sound.
— When shall we leave for China? — We won’t we have visited all the places of interest here.
— I don’t think we can find a new day to work out the problem. — But we’d better not .
— How will the boss be back? — In these days.