325.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
正确答案A，我想问一下，之所以不选D是因为其结构不简便么？？毕竟think of A as B这个结构是对的。
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发表于 2010-5-7 11:06:54
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