The boy is very brave, he_______ the tall tree.
What does Mr. Liu usually ___________when he is at school?
It’s not my blouse. It may be _______________.
Which of the following can NOT be used as subject?
How many students are born _________the star sign of Aquarius in your class?
A: I’m ___________ to eat a horse now! B: Really? But I don’t have ___________for you. It’s a great pity!