The managing director was to _______ the accident, although it was not his fault.
-You must say sorry to Mary, Jack. -Why ________ I say sorry to her? It’s her who hurt me first.
—Why didn’t you put your cellphone in your overcoat pocket? —I ________, but I was afraid it would be stolen.
—Is there a fog in the evening ? —There________be . I’ll make a phone call to find it out .
“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 ______.”