The light will be thrown ______ the cause of cancer by research that is now in progress.
| A．to | B．upon | C．in | D．for |
Put __________ use in April 2000，the hotline was meant for residence reporting water and heating supply breakdowns.
| A．into | B．in |
| C．at | D．on |
I always dream of __________ to travel to different places, meeting different people.
| A．being a chance | B．there chance |
| C．there to be a chance | D．there being a chance |
Come and __________ your wet coat, or you will catch a cold.
| A．put on | B．remove |
| C．pick up | D．put away |
The __________ of the Itaipu Dam took 30，000 people seven years.
| A．construction | B．structure |
| C．destruction | D．instruction |
__________ is possible that everyone will become happy if they change the habit of unhappiness.
| A．It | B．That |
| C．This | D．One |