D．the plug

　　答案　B

　　解析　代词指代题。作者描述的步骤是：先找到Powermat，再拿过接收器，把手机插入接收器，然后再把接收器放到Powermat上，所以it指代的是the receiver。

　　4．The underlined sentence in the last paragraph actually means ________.

　　A．Powermat is not practical

　　B．Powermat is designed for certain cases

　　C．few people like using Powermat

　　D．Powermat needs to be improved

　　答案　A解析　句意理解题。该句话的意思是：Powermat这种充电器只适合在家里工作的人，而且他们也只在家里使用iPhone，但这种可能性是很小的。由此可知，该句话的言外之意是Powermat不实用。

　　B

　　The technology is great.Without it we wouldn’t have been able to put a man on the moon，explore the ocean’s depths or eat microwave sausages.Computers have revolutionized our lives and they have the power to educate and pass on knowledge.But sometimes this power can create more problems than it solves.

　　Every doctor has had to try their best to calm down patients who’ve come into their surgery waving an Internet print­out，convinced that they have some rare incurable disease，say，throat cancer.The truth is usually far more ordinary，though: they don’t have throat cancer，and it’s just that their throats are swollen.Being a graduate of the Internet “school” of medicine does not guarantee accurate self­health­checks.

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