Expected noises are usually more _____ than unexpected ones of the like magnitude.
| A．manageable | B．controllable |
| C．tolerable | D．perceivable |
______many times, he finally understood it.
| A．To tell | B．Telling | C．Having told | D．Having been told |
Many children, __parents are away working in big cities, are taken good care of in the village.
| A．that | B．whose | C．which | D．whom |
—What’s that noise?
—Oh, I forgot to tell you. The new machine ________.
| A．was tested | B．will be tested | C．is being tested | D．has been tested |
. E-mail, as well as telephones, ________ an important part in daily communication.
| A．is playing | B．have played | C．are playing | D．play |
After he had broken the world record, Rod ____ to a restaurant to celebrate with hid friends.
| A．went | B．had gone | C．would go | D．has gone |