2018 Beijing Question 7 Single-choice Differentiating 2018_北京卷 (英语) 46. What is the main purpose of the passage? A. To explain a study method on worms.B. To introduce the diet of a special worm.C. To present a way to break down plastics.D. To propose new means to keep eco-balance. Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →