The teacher asked the boy many questions, but he only answered ______ of them.
Miss Liu is English teacher. She teaches English very well.
bad weather ! I can do something but to stay in bed for the whole day.
---How long did it _____ you to work out the difficult maths problems?---I ______ about half an hour on it .
It is very _______ of you to speak in front of all those people .
---Do you often play computer games? ---No, And so do ________ of my classmates, you know we are very busy