__________ the days went on，the situation there got worse.
| A．With | B．Since | C．While | D．As |
The road in front of our school is _____ and is closed to all the cars.
| A．repairing | B．being repaired | C．repaired | D． repair |
—Could I use your computer for a few moments, please?
—______. I’m not using it myself.
| A．Come on | B．It depends | C．Go ahead | D．That’s right |
______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 |