Why _______ you be so stubborn? You should think over my advice on this matter.

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

You had better ________some food and drinks before the field trip ________.

Days later, my brother called to say he was all right, but _______say where he was.

Mr. Bush is on time for everything. How ____ it be that he was late for the important meeting?