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天山新题20 15
15.A substance from the licorice plant, 50 times sweeter than sucrose, was recently discovered, is not only a natural sweetener but also prevents tooth decay. (A) A substance from the licorice plant, 50 times sweeter than sucrose, was recently discovered (B) A substance, which was recently discovered, from the licorice plant, 50 times sweeter than sucrose, (C) A substance from the licorice plant, which was recently discovered to be 50 times sweeter than sucrose, (D) A substance from the licorice plant, 50 times sweeter than sucrose , which was recently discovered, (E) A recently discovered substance, 50 times sweeter than sucrose from the licorice plant, 答案:B Why not E?
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