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标题: GWD17-Q32 [打印本页]

作者: bolococo 时间: 2011-6-1 07:00 标题: GWD17-Q32

32. GWD17-Q32:

Navigatorshave known for thousands of years that the ocean has variable currents, but itis only in the last half century that a reasonably clear picture has emergedof the patterns and causes of ocean currents.

A a reasonably clear picture has emerged of the    patterns and causes of ocean currents
B a reasonably clear picture of the patterns of ocean    currents and their causes have emerged
C a reasonably clear picture emerged of ocean    currents, their patterns and the causes of them
D there have emerged a reasonably clear picture of    the patterns of ocean currents and what caused them
E    there had emerged areasonably clear picture of the patterns of ocean currents and their causes

能解释一下这题为什么A正确么？in the last half century不是一个确定的时间点嘛，为什么可以用完成时？

作者: sunflower88 时间: 2011-6-1 20:37

if 不能引导表语从句，排除A/B

C中的they, 指代有歧义

比较D/E，两个whether引导的从句中，结构对称 chimpanzees -- other animals, 选E

作者: hazardous 时间: 2011-6-2 06:32

加the 和不加the 是不一样的哈
e.g. : Did you see the game on TV last night? 昨天晚上
e.g. : Interest in golf has grown rapidly in the last ten years. 最近十年

作者: bolococo 时间: 2011-6-2 20:18

噢~~！！！原来如此！！！谢谢啦~

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