【题目】 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
在线课程【答案】C
【解析】本题考查动词时态。“in the last/past +时间段”意 为“在过去的……里”，常与现在完成时连用。句意：根 据联合国的一份报告，在过去的500年里，大约844种 动植物已消失。