The __________ behind lung cancer is smoking and air pollution; thus, those who are susceptible to cancer are advised to avoid smoking and second-hand smoking.
(A) likelihood (B) culprit (C) magnet (D) catalyst
→ larondine:韋氏字典 culprit: the source or cause of a problem 12/29 12:42 → larondine:catalyst: an agent that provokes or speeds 12/29 12:44 → larondine:significant change or action 12/29 12:44
推 kevinisadog:考搭配字 catalyst "for" vs. culprit "behind" 12/29 18:00