For decades, posters depicting rabbits with inflamed, reddened eyes symbolized campaigns against the testing of cosmetics on ani

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问题     For decades, posters depicting rabbits with inflamed, reddened eyes symbolized campaigns against the testing of cosmetics on animals. Now the most severe of those【C1】________are to be banned across the European Union.
    The so-called Draize tests are a series of notorious procedures【C2】________involve applying cosmetics ingredients【C3】________the eyes and skin of live laboratory rabbits. The animals’ reactions are【C4】________to assess whether the【C5】________is an irritant or not. However, on April 27 the independent scientific advisory committee of the European Center for the Validation of Alternative Methods (ECVAM) approved a series of humane【C6】________.
    Two of these alternative tests use waste animal tissue reclaimed from slaughterhouses to replace live animals and test【C7】________chemicals might severely irritate the eyes. Two more will【C8】________live animals with in vitro cell cultures for determining whether【C9】________irritate the skin. A fifth alterative test,【C10】________identify whether chemicals will cause skin allergies , will spare hundreds of thousands of mice a year.
    These humane alternatives have been available【C11】________commercial use for years, but to enforce their use, ECVAM has had to show they are as【C12】________as or better than the procedures on live animals they are to replace. Now【C13】________the committee has validated the alternatives,【C14】________will become illegal under the European Cosmetics Directive【C15】________cosmetic companies to continue to use live animals, and regulatory authorities in【C16】________member state will be forced to outlaw their use.
   【C17】________these changes, cosmetics companies will still be allowed to【C18】________relatively mild chemicals on the eyes of live animals until further alternative tests are approved, or until 2009,【C19】________most cosmetic tests on live animals will be banned in Europe, regardless of【C20】________alternatives have been approved or not.
【C2】

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答案that

解析 本句意为“所谓的‘Draize’试验指的是一些声名狼藉的实验程序。主要是在实验室里的活体兔子的眼睛和皮肤上实验某种化妆品成分。”根据语法分析,“involve applying cosmetics ingredients…”是修饰“a series of notorious procedures”的定语从句,所以此空应填定语从句引导词“that”。本题也可填“which”。
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