<hr/>Hello,<br/><br/>Could you tell me please if these sentences are correct?<br/><br/>1.“Calm down, I will check on the house, honey.<br/><br/>2.A rest in pleasant surroundings with your friends and some calming medics is/are a highly effective treatment.<br/><br/>3.I want to invite them to go on vacation together.<br/>4.“We have a nice holiday cottage in the woods. <br/>5.A problem cropped up at the office.<br/><br/><a class='_ac _lb' lightbox='http://www.usingenglish.com/forum/images/misc/progress.gif '><img class='_ac _di img-fluid' style='height:inherit; background: inherit;' data-delaysrc='http://www.usingenglish.com/forum/images/misc/progress.gif' src='http://www.usingenglish.com/forum/images/misc/progress.gif' /></a>