---How many teachers are there in your school? --- __________. , but I'm not sure.
—I__________some photos to be developed (冲洗). Are they ready yet? —Yes. Here you are.
Once again he failed to hand in his homework _____ he had been given enough time to do it.
. _____ the book four times, I finally understood the author's theory.
Mike seldom asks ____ questions in class, but today he raised _____ fairly good one.
_____ the news, so far, has been good, there may be days ahead when it is bad.