OG 63 選項C的文法疑問

永遠是「句意」為上...文法次之...

版主: shpassion, Traver0818

OG 63 選項C的文法疑問

文章westen0331 » 2008-10-04 17:07

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

OA C

作答時我選C因為其他選項都不優
但這題我的疑問是這邊使用現在完成式have been是因為once的緣故嗎?
是否使用時間副詞的副詞子句都是要用完成式來表達未來式(本題按照句意Trim horns 應是未來式)才對?
煩請高手解惑
謝謝
westen0331
新手會員
新手會員
 
文章: 5
註冊時間: 2008-07-20 10:39

Re: OG 63 選項C的文法疑問

文章Philosophia » 2008-10-04 17:21

不太瞭解你所謂的要用 future tense

這題是因為 for 所以要用 present perfect

這題已有他人討論過了 http://www.formosamba.com/viewtopic.php?f=11&t=20156,請遵守一題一帖的版規~
Philosophia
中級會員
中級會員
 
文章: 235
註冊時間: 2006-11-03 04:24

Re: OG 63 選項C的文法疑問

文章westen0331 » 2008-10-04 17:31

不好意思我Search的時候沒有搜尋到
我的疏忽 真是很抱歉
謝謝
westen0331
新手會員
新手會員
 
文章: 5
註冊時間: 2008-07-20 10:39


回到 GMAT Sentence Correction 考區

誰在線上

正在瀏覽這個版面的使用者:沒有註冊會員 和 3 位訪客