Many British people have noticed that butterflies from its natural habitats during the past several years.
A. are disappearing
B. have been disappeared
C. have been disappearing
D. will have disappeared
网友回答
A. are disappearing
B. have been disappeared
(答案→)C. have been disappearing
D. will have disappeared
解析：考查动词时态与语态。根据时间状语during the past several years在过去的若干年，可知一直到现在，故用现在完成进行时，选C。