American history: Slavery in the American South
Student street clinic helps homeless(视频)
The government of Norway is planning to build an unusual阅读理解答案
Pirate attacks are down in 2012
Wastewater plants extract nutrients from sewage
High and fast: the X-15 reached the edge of space
Consumer spending will decline unless Congress averts fiscal cliff
Obama appeals to public about 'fiscal cliff'
Polio victim searches for love in 'The Sessions'
South pacific islands now totally powered by the sun
Unusual Mars rock surprises rover scientist
Violin maker keeps family tradition alive
When Andrew was born in Jiangsu, China, his father opened 阅读理解答案
World AIDS Day 2012 more hopeful than in past
Mobile phones could help efforts to end malaria
Musical legend Chuck Berry still reeling and rocking on stage at 86
When you eat out in a restaurant, it is not unusual阅读理解答案
Was Jesus married?
New report outlines strategy for HIV/AIDS
Many millions suffer from depression
Slow progress on curbing deforestation expected at climate conference
Words and their stories: Fall guy
Nobel Prize in economics recognizes 'market designers'
Number of Chinese students in US dramatically expands
Environmentalists worried over increased production of autos
Serving farm-fresh meals at the farm
West Nile surge keeps exterminator busy
Every night is fright night at Elegant Theater
Seattle, 'City of Clocks' keeps on ticking
Seeking HIV tests for all in US age 15-65