2016年雅思阅读长难句每日一题:Day 6

2026-03-12
练习步骤:
  step1:划分句子结构,找句子主干
  step2: 确定修饰词,修饰短语或修饰从句的修饰关系
  step3: 确定代词指代对象
  剑桥雅思9
  Reading Passage 1
  长难句:The drug is derived from the bark of the cinchona tree, native to South America, and by 1856 demand for the drug was surpassing the available supply.