Everymeans____triedoutbutneverwithsuccess,asfarasmyknowledgegoes.
C
【句意】就我所知，每种方法都试过了，但都没有成功。
【难点】means虽以s结尾却是单数形式，因此谓语动词应选用第三人称单数。
Everymeans____triedoutbutneverwithsuccess,asfarasmyknowledgegoes.
Mrs.Whitehas_____thatsheisnotabletogetajob.
Allofusknow,color-blindpeopleoftenfinditdifficultto__betweenblueandgreen.
Rumorsareeverywhere,spreadingfear,damagingreputations,andturningcalmsituationsinto____ones.
-Wehaven’theardfromJaneforalongtime.
-Whatdoyousuppose_____toher?