Whenever you meet withdifficulties, you can ask the policeman ____help.

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

I ________ the bus at the stop when it began to rain hard.

______ Mary happy today—I don’t think so. She ______ look happy this morning.

________ you happen to see Mary, would you please askher to come here