_____ to sunlight for too much time will do harm to one's skin.
| A．Exposed |
| B．Having exposed |
| C．Being exposed |
| D．After being exposed |
—Why isn't the recorder ready yet?
—I'm sorry. It________in the shop.
| A．is being repaired |
| B．is repaired |
| C．has been repaired |
| D．hasn't repaired |
As a result of the use of the new technology, the production of this product________50 percent.
| A．has risen to |
| B．has been raised to |
| C．has risen by |
| D．has been risen by |
Millions of pounds' worth of damage________by a storm which swept across the north of England last night.
| A．has been caused |
| B．had ben caused |
| C．will be caused |
| D．will have been caused |
All the gifts must be mailed immediately________in time for Christmas.
| A．in order to have received |
| B．in order to receive |
| C．so as to be received |
| D．so as to be receiving |
If city noises________from increasing, people________shout to be heard even at the dinner table 20 years from now.
| A．are not kept; will have to |
| B．are not kept; have to |
| C．do not keep; will have to |
| D．do not keep; have to |