By the year 2010,scientists probably______a cure for cancer.A.wil_英语解答

By the year 2010,scientists probably______a cure for cancer.
A.will be discoverring
B.are discovering
C.will have discovered
D.have discovered

人气：241 ℃　时间：2020-06-12 18:58:32

解答

选 C,该题是对将来完成时的应用,分析如下：将来完成时将来完成时用来表示在将来某一时间以前已经完成或一直持续的动作.经常与before+将来时间或by+将来时间连用,也可与before或by the time引导的现在时的从句连用.1...