It was announced that only when the fire was under control ___ to return to their homes.
| A．the residents would be permitted |
| B．had the residents been permitted |
| C．would be residents be permitted |
| D．the residents had been permitted |
34. Nowadays, many people walk to work ________ Copenhagen Conference calling for living a low-carbon lifestyle to cope with global warming.
| A．in relation to | B．in response to | C．in addition to | D．in opposition to |
33. The number of children who have lost parents to AIDS ________ to rise to over 26 million
in 2011.
| A．are expected | B．is expecting | C．are expecting | D．is expected |
32. Children are easily exposed to the Internet culture ________ violence increases to such a degree that parents don’t allow them to go online.
| A．which | B．whose | C．where | D．That |
31. —How much do you know about the 3D film technology?
—A little. Not until ________ the hot movie Avatar ________ some about it.
| A．did I see; did I begin to learn | B．I saw; I began to learn |
| C．I saw; did I begin to learn | D．did I see; I began to learn |
30. In some countries, treatments for A(H1N1) flu were neither ________ nor effective, and many patients died because of infection.
| A．critical | B．scientific | C．necessary | D．Special |