--- Isn't that Ann's husband over there?--- No, it ______ be him---I'm sure he doesn't wear glasses.
I was just chatting with the director when a stranger __________.
" What __________ frightening experience !"the woman who survived the earthquake said with __________ frightened look on her face.
Every means __________ prevent the water from __________.
That salesman __________ me to buy his MP4,but it doesn't work well now.
Doctors __________ him again and again to give up __________.