While every possible means __________ to prevent the river pollution, the river in my hometown has still not been restored to its past beauty.
| A．is tried | B．are tried |
| C．has been tried | D．have been tried |
At the sight of the scene of war, my _____ race back more than 50 years to the dark days of 1940.
| A．minds | B．memories | C．thoughts | D．brains |
--- Can I use the fax on the table, sir?
--- In no case _____ to use the fax for personal affairs.
| A．anyone is allowed | B．nobody is allowed | C．is anyone allowed | D．is nobody allowed |
By the middle of the 21st century, the vast majority of the world’s population _____ in cities rather than in the country.
| A．are living | B．will be living | C．have lived | D．will have lived |
--- I need to advertise for a roommate for next term.
--- _____? Mary is interested.
| A．Why bother | B．Why not | C．So what | D．What for |
A major earthquake _____ 8.0 on the Richter scale strongly _____ Wenchuan County in Sichuan Province at 2:28 p.m. on May 12, 2008.
| A．measured; shaken | B．measured; shaking |
| C．measuring; shook | D．measuring; shaking |