__ I hand in the paper this week” “No, you ______. You _____ hand it in next week.

______ students went to the show yesterday.

If we don’t take steps, the Tibetan antelopes and pandas will ____ some day just as dinosaurs.

Would you have helped her had it been possible?—Yes, but I __________ busy with my work

greater demandof vegetables, farmers have built more green houses