He was very tired,and________he didn’t give the market report.
32. Children are easily exposed to the Internet culture ________ violence increases to such a degree that parents don’t allow them to go online.
31. —How much do you know about the 3D film technology? —A little. Not until ________ the hot movie Avatar ________ some about it.
30. In some countries, treatments for A(H1N1) flu were neither ________ nor effective, and many patients died because of infection.
29.For English teachers ________ a more effective role in teaching, they must make every effort to raise students’ cross-cultural awareness.
28. —Did you hear Tom was criticized for his spelling mistakes in his English composition? —Yes, but a more careful person ________ so many mistakes.