— What is that? —It’s _______ eraser, and it’s _______ red eraser. A. a; a B. an; a C. an; an
—What should we do to prevent H7N9 bird flu? —We must from crowded places.
—It’s a long story, but you will find that there are few new words in it . —Good! it will be too hard for children.
Which is _____ difficult, this one or the other two?
—The plane is leaving right now, but Jim hasn't arrived yet. —Well, he said he _____here on time.
—What do you think of the performance yesterday evening?—Great! is o’Henry style.