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  3. When your child is supposed to be doing homework, are they chatting with their friends on Facebook or playing games? Many studie

When your child is supposed to be doing homework, are they chatting with their friends on Facebook or playing games? Many studie

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问题     When your child is supposed to be doing homework, are they chatting with their friends on Facebook or playing games? Many studies have shown that multitasking doesn’t【C1】________,【C2】________your child is probably proudly claiming they can do ten things【C3】________! Many people believe that they can【C4】________two or more tasks at the same time, but Dr. Edward Hallowell says this is【C5】________.The reality is that multitasking【C6】________poor job performance.
    New hand-help【C7】________such as smartphones, iPads, games and social networking sites make it very easy to multitask and【C8】________attention leading to difficulty focusing on the task【C9】________, such as listening in the classroom or doing homework. "【C10】________, the brain actually【C11】________kids for multitasking even though your child’s performance on every task gets worse and worse. Kids don’t know that they are doing【C12】________because they feel better when they multitask, " says Dr. Edward Hallowell.
    【C13】________the appearance of hand-held devices and social networking sites, teachers have noticed a difference in【C14】________performance, critical thinking skills and how information is【C15】________"Multitasking prevents people from gaining a deep understanding of the information they are trying to learn, " says Dr. Edward Hallowell. Kids have a difficult time sticking with a "difficult to understand" topic and【C16】________to allow themselves to be distracted (注意力分散的) , to tune out and switch【C17】________to Facebook or using their cell phones【C19】________working harder at understanding a difficult subject or problem. In the long【C19】________, multitasking affects grades. One study shows that kids that use the Internet while in class did【C20】________on tests resulting in lower grades.
【C3】
选项 A、at once
B、right away
C、in no time
答案A
解析 结合下文中的“Many people believe that they can________two or more tasks at the same time”可知，孩子们会声称能同时做十件事情。at once意为“一起，同时”，符合要求，故选A。
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