—What's the matter with the man hanging his head there?—Well,if you ________ know, he was caught stealing my bike.
The large, water-spouting statue, called “Merlin” -half lion, half fish- is the____ of Singapore.
There has been_____ rising demand for grain as_____ industrial material in spite of the nation’s good harvests.
______ the owner’s electric blanket was on fire, the pet cat kept scratching on the bedroom door till she woke up, ____ her life miraculously.
—Hi, Mary. It never entered my head that you’d come. What a surprise!—I’m on a business trip in the city and I ______ in on you.
We should try every effort to prevent violence from happening at school, ______ more and more students would drop out of school ______ their personal safety could not be guaranteed.