Which sentence is correct in American English?<br/><br/>1)<br/><br/>a)When are we supposed to get started?<br/><br/>b)When are we supposed to strat?<br/><br/>2)<br/><br/>a)Are they going to have the meeting on friday?<br/><br/>b)Are they going to do the meeting on friday?<br/><br/>3)<br/><br/>a)How long has it been since Joe was born?<br/><br/>b)How long has it been since Joe born?<br/><br/>Thanks <img class='emoticon' style='Width:19px;Height:19px;' data-delaysrc='https://uat-englishforward-forums-backend.s3.us-west-2.amazonaws.com/Emoticons/1.gif' src='https://uat-englishforward-forums-backend.s3.us-west-2.amazonaws.com/Emoticons/1.gif' alt='Emotion: smile'/>