Tony couldn’t remember ______he had turned off the computer before he left the office．
| A．that | B．where |
| C．when | D．whether |
A lot of people find it useful to have a phrasebook when they travel to a country _____they don’t know the language．
| A．where | B．when | C．why | D．which |
The Arabian Nights _____ well known all over the world, in which many a story_____ interesting and instructive．
| A．is; are | B．are; is | C．are; are | D．is; is |
No sooner _____ on the TV than I heard the news that the stampede in Cambodia’s capital, Phnom Penh, had left 375 victims dead．
| A．had I turned | B．did I turn | C．I had turned | D．I turned |
It is estimated that the novel will be _____ of his best sellers, for his novels are quite popular among young people．
| A．other | B．either | C．another | D．the other |
The computer system broke _____ suddenly while he was searching for information on the Internet．
| A．down | B．out | C．up | D．in |