It is dangerous to play with the knife. You ______ hurt yourself.
| A．can | B．may | C．must | D．should |
______ that no one was ever prepared for it.
| A．So suddenly did the bad news come |
| B．So suddenly the bad news came |
| C．So did the bad news come suddenly |
| D．Did the bad news come so suddenly |
I could tell he was surprised from the _____ on his face.
| A．appearance | B．view | C．sight | D．expression |
The book seems to have been _____ from various books and articles.
| A．pieced together | B．taken off | C．broken away | D．pulled out |
As more and more cars are produced and used, so the _____ from their exhaust-pipes contains an even larger volume of poisonous gas.
| A．exposure | B．distribution | C．expansion | D．emission |
He left in such a hurry that I _____ had time to thank him.
| A．almost | B．even | C．nearly | D．scarcely |