Multitasking while doing homework is another concern.Some kids listen to music，watch TV or use the phone while doing their homework.“It’s important to make sure that you can stop and concentrate on one thing deeply，” says Rideout.

　　With new and exciting devices hitting stores every year，keeping technology use in check is more important than ever.“Kids should try，” adds Rideout.“But parents might have to step in sometimes.”

　　5．The text is mainly about kids’

　　．

　　A．cell phone use

　　B．various hobbies

　　C．favorite video games

　　D．using electronic devices

　　答案　D

　　解析　主旨大意题。文章通过Brandon Blanco的例子引入对“青少年使用电子设备”情况的研究，介绍了研究的结果、有关专家对青少年使用电子设备过多这一情况的分析。由此判断全文主旨是青少年使用电子设备。

　　6．It can be learnt from the text that

　　.

　　A．Brandon feels annoyed about his late­night message

　　B．Olson is against teenagers’ using mobile phones

　　C．many teenagers lack friends in their middle school

　　D．kids have too many electronic devices to choose from

　　答案　D

　　解析　细节理解题。根据第三段前两句“Brandon’s use of technology doesn’t stop there.He also has a computer，a TV and three video­game consoles(控制台) in his room.”可知，现在青少年可选择使用的电子设备太多了。

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