_____ the secret of nature, the young scient
ist has little time for ent
ertainment．
| A．Devoted to bring up |
B．Devoted himself to bring up |
| C．Devoted to bringing up | D．Devoting to bring up |
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 |
—What happened to the priceless works of art?
—________.
| A．They were destroyed in the earthquake |
| B．The earthquake was destroying them |
| C．They destroyed in the earthquake |
| D．The earthquake destroyed them |