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17. Scientists calculated that the asteroid, traveling at 46,000 miles an hour, is on an elliptical path that orbits the Sun once a year and regularly brings it back toward Earth. (A) hour, is on an elliptical path that orbits the Sun once a year and regularly brings it (B) hour, is orbiting the Sun once a year on an elliptical path that regularly brings it (C) hour, once a year orbits the Sun, regularly bringing it on an elliptical path (D) hour and orbiting the Sun once a year on an elliptical path, regularly bringing it (E) hour, orbits the Sun on an elliptical path once a year and that regularly brings it
答案是b，怎么解释呢， path that regularly brings it中若it指代asterroid，path怎么把它bring back呢 多谢了 | 
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发表于 2006-8-6 20:41:00
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