It’s great that all the visitors who on the island were saved.
A. trapped
B. have been trapped
C. had trapped
D. had been trapped
网友回答
A. trapped
B. have been trapped
C. had trapped
(答案→)D. had been trapped
解析：句意：所有被困在岛上的游客都得救了，这真是太棒了。本题考查过去完成时的被动语态。由were saved 可知此事发生在过去，且被困应在被救之前，应用过去完成时，同时，visitors 和trap构成被动关系。