【题目】To my delight, the students are recycling many things they ______ away in the past.
A. were throwing B. will be throwing
C. had thrown D. would have thrown
在线课程【答案】D
【解析】
试题分析：考查虚拟语气。句意：令我欣慰的是，学生们把它们以前本来会丢掉的东西回收了。would have thrown指本来会丢掉，但事实上没有丢掉，故选D项。