---Is the girl in the red skirt your sister?---No. It _______ be her. She has flown to Australia.

You didn’t have breakfast. You ________ be hungry now.

You can’t imagine that a well behaved gentleman          be so rude to a lady.

You had better _________ wine because you have to drive back home.

 For everyone’s safety, we ___________ a1ways remember the law against driving after drinking.