标题: OG13-78 [打印本页] 作者: 阿萨德积极 时间: 2013-11-18 00:06 标题: OG13-78 A proposal has been made to trim the horns from rhinoceroses to discourage poachers; the question is whether tourists will continue to visit game parks and see rhinoceroses after their horns are trimmed.
(A) whether tourists will continue to visit game parks and see rhinoceroses after their horns are
(B) whether tourists will continue to visit game parks to see one once their horns are
(C) whether tourists will continue to visit game parks to see rhinoceroses once the animals’ horns have been
(D) if tourists will continue to visit game parks and see rhinoceroses once the animals’ horns are
(E) if tourists will continue to visit game parks to see one after the animals’ horns have been
正确答案是C
这里OG上说A:are trimmed should be have been trimmed.
但是我认为既然有了after,这里就可以表达出动作的先后顺序，所以即使不用have been trimmed也是可以的。
请指教！
A proposal has been made to trim the horns from rhinoceroses to discourage poachers; the question is whether tourists will continue to visit game parks and see rhinoceroses after their horns are trimmed.