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>>2016GMAT暑假备考特辑<<

　　新东方网GMAT频道在此和大家分享GMAT语法练习题OG2015-SC-140，希望对大家掌握GMAT语法有所帮助。

　　(OG2015-SC-140)

　　Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth.

　　A.has been dated to be 3.47 billion years old and thus is

　　B.has been dated at 3.47 billion years old and thus

　　C.have been dated to be 3.47 billion years old and thus are

　　D.have been dated as being 3.47 billion years old and thus

　　E.have been dated at 3.47 billion years old and thus are

　　点击查看北京新东方GMAT教师周谢慧和王燚为大家带来的详细解析

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