1 . On February 15th, a meteor (流星), something from ______ (外部的) space, crashed into Russia’s Ural Mountain region. (根据汉语提示单词拼写)

2 . Fish­keeping is a widespread hobby and the keeper can ________ (观察) their behaviour in the glass tank and study its entire life cycle. (根据汉语提示单词拼写)

3 . Seeing the falling plane, painful memories of terrorist attack on Sept. 11, 2001 ______ (闪过) across his mind. (根据汉语提示单词拼写)

4 . Since 1993 OPEC, the oil cartel dominated by Saudi Arabia, has kept its ________ (产量) constant at around 25m barrels a day. (根据汉语提示单词拼写)

5 . Most stories are written to have characters, a setting and a ________ (情节), but what sets apart a truly great story from the one that might not finish reading is conflict. (根据汉语提示单词拼写)

6 . Migrating birds affect ecosystems both at home and at their winter destinations, and disrupting the traditional ________ (线路) could have unexpected side effects. (根据汉语提示单词拼写)

7 . As most of us forget memories from our first few years as we grow older, this early long­term memories will likely be lost in ________ (随后的) years. (根据汉语提示单词拼写)

8 . The NASA Educational Launch of Nano Satellite program, which offers free launches for educational groups and science ________ (任务), is now open to U.S. nonprofit corporations as well. (根据汉语提示单词拼写)

9 . The fact is that no matter how nicely we dress, or how beautifully we decorate our home, we can’t be truly ________ (优雅的) unless we have good manners. (根据汉语提示单词拼写)

10 . Green, ________ (可持续的) tourism is considered to have offered the best of both worlds, protecting the ecology of an area while keeping local businesses booming. (根据汉语提示单词拼写)