Allofmyeffortsto__________peacefailed.

WecanvisityourcompanyonMondayorTuesday,ourplansarefairly__________.

翻译：saletax

Hiswife,towhomhe__________forthirtyyears,waschildless.

Theresearchprojecthasonlybeenunderwayforthreemonths,soit’toosearlyto_______itssuccess.