Mr. Bush is on time for everything. How _______ it be that he was late for the opening ceremony?

—Tom graduated from college at a very young age.—Oh,he__________have been a very smart boy then.

— Be quiet, the head teacher Mr. Gu is coming.— Don’t worry. It _____ be him. Mr. Gu is much fatter.

I’m impressed with his determination. When he had a problem to solve, he  _____ work at it until he found an answer.

—We want someone to design the new art museum for us?—          the young fellow have a try?