问题
选择题
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
答案
答案：C
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。