Question

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

Answer 1

C

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。