----I am really surprised that a policeman in his car __________ have hit several common pedestrians, killing one and injuring three.----Yes, If one __________ ask for trouble, what can we say?

The lady in this photo _______ be over fifty! She looks so young!

The well-dressed lady was caught stealing in the fashion shop, Strangely enough,she       have done such a thing.

----Must I finish that work today?----No, you _____. You may finish it in three days.

—Must I take out the trash?—No,  you ________.