【题目】Alcohol is also classified as a downer, and although it is legal, it can damage the liver anddo great harm if __________ in large quantities.
A. consume B. to consume C. consuming D. consumed
在线课程【答案】D
【解析】if引导的状语从句的省略，补充完整应为if itis consumed. . . ，alcohol 与 consume 之间为被动关系。