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标题: XDF蓝皮中册P100T7??? [打印本页]

作者: ADream1234 时间: 2007-5-6 11:42
标题: XDF蓝皮中册P100T7???

A proposal has been made to trip 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 and see rhinoceroses once the animals' horns have been

答案是C.可是为什么用 HAVE BEEN??? 只要 ARE TRIMMED 不就够了吗?

作者: Jolin_hz 时间: 2007-5-6 11:55

要用once,因为是假设，have been 更好地体现先后顺序

作者: veveygum 时间: 2007-5-6 12:33

关键是AB中的THEIR指代不清，可能误认为是tourists

所以C中把THEIR换成animals是对的

作者: 小小沙子11 时间: 2007-5-6 21:30

OG 上的原题,看下官方解释吧

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