______ twice a year, whether it is a car, a bus or a truck, is the rule that every driver must obey in this city.
A Having been examined B Examined C Being examined D Examing
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 |
29.For English teachers ________ a more effective role in teaching, they must make every effort to raise students’ cross-cultural awareness.
| A．to play | B．playing | C．having played | D．Play |