be thought to

groundkeeper · 发表于 2004-7-28 18:37:00

Geologists believe that the Bering land bridge, over which human beings are thought to have first entered the Americas, disappeared about 14,000 years ago when massive glaciers melted and caused thae sea level to rise several hundred feet worldwide.

(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

key is A, 求教A, E 那不同???

麻集爱 · 发表于 2004-7-28 18:57:00

感觉这里first是代名词, 指Bering land bridge.

sth be thought sth to do ...

JerryGuan · 发表于 2004-7-28 20:01:00

这并非一句话能说完的。

看看前人的贴子吧 http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=23279

groundkeeper · 发表于 2004-7-31 10:33:00

以下是引用JerryGuan在2004-7-28 20:01:00的发言：

这并非一句话能说完的。

看看前人的贴子吧 http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=23279

JerryGuan, thanks for your reference!! thank you!

be thought to

be thought to

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