Everymeans____triedoutbutneverwithsuccess,asfarasmyknowledgegoes.
A、isC
【句意】就我所知，每種方法都試過了，但都沒有成功。
【難點】means雖以s結尾卻是單數形式，因此謂語動詞應選用第三人稱單數。
It’snecessary_________usallto________
I don’t know ______ a show. Can you tell me?
His companions have threatened to__ his crimes to the police.
____, she led a life of complete seclusion.
I am sorry I have no time at present to ____more detail or give you an account of other cities of interest.
