这两个题的讨论,真是让我长了见识。
by the way, 发现一个问题
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,
大家看看not only, but also 的结构对吗? is not only a natural sweetener but also prevents tooth decay. 为什么不是 not only is a natural sweetener but also prevents tooth decay.
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