<綜合測驗>第21至25題為題組 Scientists already knew earlier that wind and splashes of rainwater can move bacteria and other germs from leaf to leaf. ___22___ other possible transmission routes， researchers at Virginia Tech observed water drops on the leaves of wheat plants that were infected with leaf rust. (A) As a result of (B) In a search for (C) With a view to (D) To the extent of
