刚刚在做天山新题20题的第15题,原题如下 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, the key:B。 我考虑了一下这题的b选项成立那么也就意味着50 times sweeter than sucrose可以确定无误的指向a substance,我突然想起我以前也做过类似的题,好像插入语部分都是直接指向前面主干部分的主体名词的。或者说,插入语成分之间是并列的关系,它们之间是不可以构成修饰关系的,这个想法好像太僵硬了,不知道大家怎么看。