____ to everyone the importance and value of these historic sites, the government has strengthened regulations to protect them.
| A．To stress | B．Stressing |
| C．Having stressed | D．Stressed |
The camera is ____ expensive ____ I can’t afford it.
| A．so; that | B．such; that | C．so; as to | D．enough; that |
Peter, as well as his two sisters Sondra and Emily, ____ left-handed.
| A．is | B．has | C．are | D．have |
Not only ____ work faster, but also he worked better.
| A．he did | B．does he | C．he does | D．did he |
We made ____ clear when and where we ____ going to have the meeting.
| A．that; are | B．it; are | C．it; were | D．that; were |
____ volcanoes now for many years, I am still amazed at their beauty as well as their potential to cause great damage.
| A．Studied | B．To study | C．Having studied | D．Studying |