—Why didn’t Sam attend the party yesterday evening?—He ___ not have wanted to see me.

 This book ______ , because his name is on the book. 

 — Mary, whose photo is it?—It ______ be Lu’s. Those are her parents.

  —The winner is a tall and thin boy with glasses!—Well，it________ be Mike.  He doesn’t wear any glasses.

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