885 sction11 17

riverquiet

17.   Scientists calculated that the asteroid, traveling at 46,000 miles an hour, is orbiting the Sun once a year on an elliptical path that regularly brings it

 back toward Earth.

这的IT指代什么，会否有歧义？

17.   Scientists calculated that the asteroid, traveling at 46,000 miles an hour, once a year orbits the Sun, regularly bringing it on an elliptical path 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（B）

(E) hour, orbits the Sun on an elliptical path once a year and that regularly brings it

riverquiet

answer B