Those of the legislators opposing the swampland protection bill have only theirselves to blame for the plight of the endangered black thrush bird.正确答案是: legislators opposed to the swampland protection bill have only themselves
首先一看这划线的部分就应该知道不对了,英语写的再难看上两眼也是应该知道它在说什么,原文划线部分狗屁不通。 第二本句主语legislators,谓语have,opposed to the swampland protection bill 可以理解为曾经反对这个保护法案的立法者,起到修饰legislator的作用,opposed使用过去式表示这些人曾经做过的意思