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  3. Everyone knows that too much time in the sun can expose you to excessive ultraviolet radiation, which can lead to skin cancers.【

Everyone knows that too much time in the sun can expose you to excessive ultraviolet radiation, which can lead to skin cancers.【

admin2019-07-31  5
问题     Everyone knows that too much time in the sun can expose you to excessive ultraviolet radiation, which can lead to skin cancers.【C1】______that’s not going to stop people from cooking themselves【C2】______the perfect tan. The problem has become an【C3】______: more than 3.5 million skin cancers in over 2 million people diagnosed annually in the U.S. 【C4】______our sun-worshipping ways, scientists and the skin-care industry are working hard to
   【C5】______out the safest way to tan. A handful of wearable products have【C6】______made it to market that alert wearers of UV radiation【C7】______—they tell you you’re about to【C8】______before you can see it.
    The simplest might be Smartsun wristband, which alerts wearers of UV overexposure with just a【C9】______of color. It starts【C10】______as yellowish-brown when first exposed to UV rays; when it【C11】______pink, that’s the warning to seek【C12】______and slather on sunscreen.
    If you prefer something a little more【C13】______, try the UVeBand, which vibrates when you’ve had your share of UV rays. Then there’s the JUNE, developed and recently【C14】______by Netatmo. The JUNE has UV sensors built into a fake jewel that connect wirelessly to a smartphone, where an app monitors UV【C15】______in real time, alerting when it’s time to get out of the sun. It also【C16】______your radiation exposure over time,【C17】______you can see how bad your summer has been for your skin, long term.
    All of these products are designed to help wearers【C18】______their sun time. But none have been reviewed or【C19】______by any health regulatory body, which raises some【C20】______.
【C10】
选项 A、out
B、over
C、off
D、from
答案C
解析 空格处应该填入一个副词，与start构成词组。如上题解析，本段细节句里的start，first，when等词表现的是时间上的先后关系，因此所选词要与start构成时间关系词组。故选C项，start off“开始”。
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考研英语一

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