They received demands that the work ________ at once.

- Mum, I failed to catch the train. - If you __________ at the station ten minutes earlier, you could have caught it.

—Has Ham started out? He said he would join in the party.—He ____. He is a man who always keeps his word.

一How dangerous it was!—Yes，but for the young man’s quick action，he_________ run over by the car．

—May I speak to the patient now?—No, you _____. He is too weak now.