No person _______ carry a mobile phone into the examination room during the national college Entrance Examinations.
| A．shall | B．must | C．can | D．need |
—Which of those electronic dictionaries do you like most?
—.They are expensive and of little use.
| A．None | B．Neither | C．All | D．Both |
Studies show that Americans chat on their phones for more than five hours a month, _____ Europeans.
| A．as much as twice | B．twice as much as |
| C．as much twice as | D．as twice much as |
Although many measures _____, the world’s economy is still going down.
| A．are taken | B．were taken |
| C．will be taken | D．have been taken |
The teacher asked the two students to discuss the question in a low voice______ they should bother the others.
| A．so that | B．in case | C．in order that | D．now that |
One third of the country_____ covered with trees and the majority of the citizens______ black people.
| A．is; are | B．is; is | C．are; are | D．are; is |