2. 外语
  3. A. abundant B. casually C. concerns D. epidemic E. exaggeration F. excessive G. figure H. intensity I.

A. abundant B. casually C. concerns D. epidemic E. exaggeration F. excessive G. figure H. intensity I.

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问题    A. abundant     B. casually    C. concerns    D. epidemic   E. exaggeration
   F. excessive     G. figure     H. intensity    I. launched   J. observes
   K. overexposure   L. possession   M. search    N. tracks    O. wirelessly
   Everyone knows that too much time in the sun can expose you to 【C1】______ ultraviolet radiation, which can lead to skin cancers. But that’s not going to stop people from cooking themselves in 【C2】______ of the perfect tan. The problem has become an 【C3】______: more than 2 million skin cancers in over 3.5 million people diagnosed annually in the U.S.
   Given our sun-worshipping ways, scientists and the skin-care industry are working hard to 【C4】______ out the safest way to tan. A handful of wearable products have recently made it to market that alert wearers of UV radiation levels—they tell you you’re about to burn before you can see it.
   The simplest might be Smartsun wristband, which alerts wearers of UV 【C5】______ with just a change of color. It starts off as yellowish-brown when first exposed to UV rays; when it turns pink, that’s the warning to seek shade and slather (厚厚地涂)on sunscreen.
   If you prefer something a little more invasive, try the UVeBand, which vibrates when you’ve had your share of UV rays. Then there’s the JUNE, developed and recently 【C6】______ by Netatmo. The JUNE has UV sensors built into a fake jewel that connect 【C7】______ to a smartphone, where an app monitors UV 【C8】______ in real time, alerting when it’s time to get out of the sun. It also  【C9】______ your radiation exposure over time, so you can see how bad your summer has been for your skin, long term.
   All of these products are designed to help wearers maximize their sun time. But none have been reviewed or approved by any health regulatory body, which raises some 【C10】______.
【C9】
选项
答案N
解析 空格前为主语It，空格后为名词your radiation exposure，则空格处需填入动词第三人称单数，作谓语。由long term“长期”推测，此处讲的是长期跟踪监测radiation exposure，词库中tracks“跟踪”符合语境，故选N项。observes“观察”不能与long term呼应，可排除。
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