– Amazing! You _____ have won the first prize in the national English speech contest!– I’m lucky that all my efforts have finally paid off.  

— Who’s that man over there standing in the garden? Is it Mr. White?—It __________ be him. He has gone to Shanghai on business. 

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

What he said at the meeting made Mary rather embarrassed, so he felt that he ______ differently.

--- The fog is so thick that the express way ____ have been closed. --- You are right. I ____ have thought of that. Now we have to take another road.