When I came back from my 10-day holiday I found the fish tank was broken and the fish.A.

问题补充：

When I came back from my 10-day holiday, I found the fish tank was broken and the fish.

A. has died

B. had died

C. would die

D. died

答案：

A. has died

(答案→)B. had died

C. would die

D. died

解析：考查时态。我回来发生在过去，而回来之前鱼已经死了，表过去的过去发生的事，要用过去完成时。选B。