Why do you turn off the light in the room? We are in total ______ now and I can’t see anything.
| A．silence | B．darkness | C．progress | D．charge |
When and where to build the new power station ______ yet.
| A．is not decided | B．are not decided | C．has not decided | D．have not decided |
_____is a good of exercise for both the young and the old.
| A．The walk | B．Walking | C．To walk | D．Walk |
________more attention, the work would have been done better.
| A．Given | B．o give | C．Giving | D．Having given |
Most air pollution is caused by the burning of _________ like coal, gas and oil.
| A．fuels | B．articles |
| C．goods | D．products |
I bought a dress for only 10 dollars in a sale; it was a real _________.
| A．exchange | B．bargain |
| C．trade | D．business |