--- Isn’t that Ann’s husband over there ?--- No, it _______ be him--- I’m sure he doesn’t wear glasses.

In general，she is devoted to her studies，but she________be little naughty at times.

 —Tom is in low spirits today. He ______ again in the job interview.—What a pity! He has been greeted with bad luck these days.

We can hardly believe that an intelligent person like Daniel ________ be asking such a silly question.

—My daughter mastered English in less than two years. —Did she? She________have a gift for languages.