The new discovery _______ be of great service to mankind.
A、isboundtoA
beboundto：注定要，一定会。本题中主语是Thenewdiscovery，所以谓语动词要用is。句意：这项新发现对于人类必定大有用处。
Itisnousearguing_______theplanbecauseithasbeenrejected.
Thenewdiscovery_______beofgreatservicetomankind.
Thesadconditionofwomenworkingashouseservantsaroundtheworldreceivedmuchmedia_____earlythisyear.
_______foryourlaziness，youcouldhavefinishedtheassignmentbynow.
CharlesSmith,______wasmyformerteacher,retiredlastyear.
