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标题: [求助]大全446 [打印本页]

作者: 肥老鼠    时间: 2008-11-30 21:49
标题: [求助]大全446

It may be another fifteen years before spacecraft from Earth again venture to Mars, a planet now known to be cold, dry, and probably lifeless.

(A) again venture to Mars, a planet now known to be

(B) venture to Mars again, a planet now known for being

(C) will venture to Mars again, a planet now known as being

(D) venture again to Mars, a planet that is known now to beA

(E) will again venture to Mars, a planet known now as being

答案A  这题不会。为什么不能用将来时呢?在飞船再到火星之前要花15年,飞船不是还没去吗?还有大全注释上说spacecraft复数,单复数对这题有什么影响吗?


作者: leonard_miao    时间: 2008-12-1 00:16

用排除法的话可以得出 A,

a planet now known to be中省略 that is, be known to do固定短语,now 须放在动词之前

故只有A项符合

至于时态的问题我也搞不懂

还是请大N解答吧~~~~


作者: leonard_miao    时间: 2008-12-1 00:16

用排除法的话可以得出 A,

a planet now known to be中省略 that is, be known to do固定短语,now 须放在动词之前

故只有A项符合

至于时态的问题我也搞不懂

还是请大N解答吧~~~~


作者: celery0619    时间: 2008-12-1 10:01

好像是现在时态叙述宇宙飞船从地球到火星大概要15年。。。


作者: aeoluseros    时间: 2008-12-1 10:10
在时间(、条件或让步)状语从句中,动词永远不能用将来时。如果从句表示将来的意思,从句中要用与其相对应的一般形式来表示(——将来进行与将来完成时等用现在进行式或现在完成式等形式来表示)。
作者: 肥老鼠    时间: 2008-12-3 09:50
谢谢大家




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