【2013陕西】We are planning to have a surprise party ________ her fifteenth birthday.
Linda often ________ her homework in the evening, but this evening she __________ TV.
He gave me a good ______.
He saw the little girl _____ when he was on his way to a party.
My grandpa is a science teacher and he _______ science.
________ book on the desk is _______ useful one.