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Because Halleys comet changes orbit slightly during the [#permalink]
21 Oct 2005, 12:43
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3. Because Halleyâ€™s comet changes orbit slightly during the seventy-six-year interval between passing close to Earth, it may veer onto a collision course with a planet sometime in the distant future.
(A) between passing
(B) of passing
(C) between its passes
(D) of its passes
(E) as it passes