Sorry, I _______ to help you at nine. I was busy at that time.
–You should be _______ careful when you take the chemistry exam. --I agree. In this way, I will make _______ mistakes.
Tom is weak in physics. He always feels _______ before he takes a physics test.
–John. Father is not feeling well. --I know. A doctor has been sent _______. But he hasn’t turned _______ yet.
–There is _______ interesting book on the teacher’s desk. --Oh, ______ book is Wei Fang’s.
He decided not to tell his parents that he was going home because he wanted to give them a _______.