高中英语外研版2019选择性必修二Unit1 Uderstanding ideas练习

英语科学案——单元练习 学生： XB2 Unit1 Growing up——Understanding ideas 1、 阅读（每空2.5分，共10分） 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2、 完型填空（每空1分，共15分） 三、语法填空（每空1.5分，共15分） 1.________________ 2________________ 3.________________ 4__________________ 5.________________ 6________________ 7________________ 8._________________ 9.________________ 10._______________ 一、阅读理解 When is a kid not a kid anymore? If you asked my 12-year-old daughter, the magical age would be 13, when you can no longer be considered a “child”. If you asked my 15-year-old niece, the age would be 16, when she will be able to drive a car and get an after-school job. According to the U. S. government, a child officially becomes an adult when they turn 18. That's when they can vote. But even though an 18-year-old starts paying taxes, the government does not consider that person mature enough to buy a beer. Still, even a kid who can buy a beer is not old enough to rent a car. Scientists have learned from a new study that when kids are around 18, their prefrontal cortex, which helps control impulses(冲动), solve problems, and organize behavior, is only halfway developed. That's not to say that kids in their late teens and early 20s can't take on these tasks, but it means that it's harder for them to do so — at least until around age 25 or so when this area of the brain fully develops. “What we're really saying is that to have a definition (定义) of when you move from childhood to adulthood looks absurd,” Peter Jones from the University of Cambridge said. “It's a much more nuanced (微妙的) change that takes place over thirty years.” This isn't a news flash for parents who have watched their teens take crazy risks while seeming unable to get their lives together until they're older. But this information throws new light on the way kids without as much support are treated. In the foster (寄养的) care system, once a child turn