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标题: 207和220 [打印本页]

作者: Hippo 时间: 2003-11-10 23:33
标题: 207和220
207. Geologists believe that the Bering land bridge, over which human beings are thought to have first entered the Americans, disappeared about 14,000 years ago when massive glaciers melted and caused the sea level to rise several hundred feet worldwide.
(A) are thought to have first entered
(B) were thought first to enter
(C) were thought at first to enter
(D) are thought of as first entering
(E) were thought to first enter

220. Because Halley’s comet changes orbit slightly during the seventy-six-year interval between passing close to Earth, it may veer onto a collision course with a planet sometime in the distant future.
(A) between passing
(B) of passing
(C) between its passes
(D) of its passes
(E) as it passes

请问各位牛牛问何答案是A和C,而不是B和E. 另外有12月在上海考试的朋友吗？我们可以一起结对复习吗？

作者: gemj 时间: 2003-11-11 00:05
207　(b) were thought first to enter中用的是过去时，意味着现在就不这么认为了。意思不对。

220　interval 后面跟between 比较合适啊。

作者: dandan74 时间: 2003-11-11 16:03
gemj,

你搞清楚不定式的时态问题了吗？
207如果改成are thought to first enter 还对不对呢？

作者: cappuccino 时间: 2003-11-12 12:01
207, 说话的时间在现在,表示人们现在认为:HUMAN BEING TO HAVE ...
220, 间隔是只几次间的,后面常用BETWEEN. PASS 是名词, PL. 不用动词-ING 形式
前面用ITS 表示限定, 好,明确

作者: gemj 时间: 2003-11-12 14:48

以下是引用dandan74在2003-11-11 16:03:00的发言：
gemj,

你搞清楚不定式的时态问题了吗？
207如果改成are thought to first enter 还对不对呢？

虽然我还没有搞清楚，但如果这么改是肯定不对的。因为enter 是过去的事情。发生在主句动作之前。

作者: turtlechen 时间: 2004-1-11 04:06

以下是引用gemj在2003-11-12 14:48:00的发言：
虽然我还没有搞清楚，但如果这么改是肯定不对的。因为enter 是过去的事情。发生在主句动作之前。

Agree.
The present perfect tense can be used to describe events in the past.
In an infinitive, it has to be changed to present perfect to express it.

補充一題：
218.The domesticated camel, which some scholars date around the twelfth century B.C., was the key to the development of the spice trade in the ancient world.
(A) The domesticated camel, which some scholars date
(B) The domesticated camel, which some scholars having thought to occur
(C) Domesticating the camel, dated by some scholars at
(D) The domestication of the camel, thought by some scholars to have occurred
(E) The camel’s domestication, dated by some scholars to have been

Ans: D
prior discussions:
http://forum.chasedream.com/dispbbs.asp?BoardID=23&replyID=216269&id=28995&star=1&skin=0

[此贴子已经被作者于2004-1-11 4:44:06编辑过]

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