Which of the following can NOT be used as subject?
—Listen ! Helen is singing in the next room. —It _______ be Helen. She has gone to Beijing.
Many visitors come to Beijing because it is ________ city.
My friend Jack is from _____European country.We all think he is____honest boy.
Our sports meeting has been _______ till next Tuesday because of the bad weather.
The television ________. It doesn’t work now.