can hardly wait to do —— > look forward to doing // can't wait to do // be anxious to do

　　can't fit it in —— > too busy

　　can't get away with that —— > will get into trouble

　　can't put the book down —— > the book is interesting

　　can't recognize —— > looks different

　　can't stick around —— > have to go

　　can't turn down an offer —— > be eager to go

　　carry out the plan —— > implement the plan

　　casual —— > informally