—Do you often get online?— Yes. I ______ lots of time on it. It’s a good way to kill 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.
---- There is _______ interesting book on the teacher’s desk.---- Oh, ______ book is Wei Fang’s.
—Where are you? I can’t see you in the hall.—______. I’m just one block away.
—______ did Samuel stand by the window so long?—To see what would happen.