According to a UN report, some 844 animals and plants in the last 500 years.
A. disappeared
B. were disappeared
C. have disappeared
D. had been disappeared
网友回答
A. disappeared
B. were disappeared
(答案→)C. have disappeared
D. had been disappeared
解析：考察时态，根据题意根据联合国报告，在过去500年中大约844中动物和植物已经消失。说的是过去发生到现在已经完成的事情，故选C，现在完成时态。