We often hear of cats which disappear when the peoplewho keep them moving to a new area and are later___back to their old home.
A.find B.finding C.found D. to found
參考答案:这句主语是cats,find与cats构成动宾关系,所以要用被动语态。
可以理解为:
We often hear of cats which disappear and are later found back to their old home when the people who keep them moving to a new area.