【题目】The custom, practice, idea and belief have __________ from generation to generation.
A. passed down
B. been passed down
C. been carried forward
D. to passed on
在线课程【答案】B
【解析】句意：风俗、习惯、思想和信仰都是一代一代地传下来的。passsth. down(常用于被动语态）一代一代传下去；pass on (to sth. )从一阶段进人另一阶段；carry for-
ward向前推进。根据句意这里应该用被动语态，表示“一代一代传下去”。