-Someone’s knocking at the door. Is it your mother?-No, dad. It _____be mom. I saw mom ____in the bedroom just now.
There ______ a knife and two forks on the table.
At last, the little boy was made _______ and began to laugh.
The little girl with her classmates _______ playing computer games happily now.
People complain that the price of the apartment is getting.
Lucy spent three years _______ Chinese before she came to China.