must be authenticated must be authorised must be authorized must be available must be avoided must be awake must be awarded must be aware must be away must be awesome must be awful must be backed must be backed up must be bad must be balanced must be banned must be baptized must be based must be beaten must be beautiful must be believed must be ben must be better must be bilingual must be black must be blessed must be blind must be blocked must be blocking must be blood must be boiled must be bold must be booked must be bored must be boring must be born must be born again must be borne must be borne in mind must be bought must be bound must be brave must be bridged must be brief must be broken must be broken down must be brought must be brought to justice must be built must be buried must be burned must be burning must be busy must be calculated must be calibrated must be called must be calm must be canadian must be canceled must be cancelled must be capable must be capitalized must be captured must be careful must be careful not must be careful when must be carefully must be carried must be carried out must be carried out only must be carrying must be cast must be catching must be caught must be cautious must be celebrated must be centered must be central must be certain must be certified must be changed must be characterized must be charged must be checked must be checked at must be chemically must be chosen must be cited must be claimed must be clarified must be classified must be clean must be cleaned must be cleaned regularly must be clear must be cleared must be clearly must be clearly defined must be clearly identified