According to the public notice from the police station, ____$5,000 reward will be offered for ____ return of the stolen cultural relics.
“Look at these tracks. It _______ be a wolf.” “Don’t be so sure. I think it _______ be a fox.”
“Show me your permit, please.” “Oh, it’s not in my pocket. It ______.”
“Is there a flight to London this evening?” “There _______ be. I’ll phone the airport and find it out.”
Why did you just sit and watch? You _______ me.
“Why didn’t she come to the meeting yesterday?” “I’m not so sure. She ______ ill.”