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Geologists believe that the Bering land bridge, over which [#permalink]
02 Jun 2004, 05:05
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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
To choose from â€˜areâ€™ or â€˜wereâ€™ â€“ I eliminated â€˜wereâ€™ subjunctive because it is used traditionally in expressing hypothetical situations or when you presuppose contrary to fact (eg If I were richâ€¦). In this case â€˜Geologists believeâ€™ and the tense is still present.
B,C, E eliminated.
between A and D, A fits the sentence â€“ â€œto have first enteredâ€