Everymeans____triedoutbutneverwithsuccess,asfarasmyknowledgegoes.
A、isC
【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。
Due to the bad weather the plane was ____ for two hours.
I_______ that there_______ an evening party on Saturday evening.
Thechildrenshouldgotoschoolinsteadoftosupporttheirfamilies.
Nowhere but in the remotest region of the country ____find a place to settle down.
The foreigners _________there, but they _________the food there at first.
