Your CV will have to be truthful and verifiable. Therefore, tell us the skills and experience you have, and then we can help you to present this in a way that will maximize your chances of being accepted into a construction management program.
When writing any resume or c.v., you should tailor it, as much as possible, to the job you are applying for. So, if you have a lot of work experience, include only the ones that are relevant to your application. If you have a limited amount of work experience, try to describe the responsibilities you had there in a way that makes them as relevant as possible to the job you are applying for, or that shows you as developing general skills that virtually any employer would be interested in. Just because you have to be honest doesn't mean you can't be creative (the art of spin). So, if you spent a summer working at McDonald's, if you spent anytime at all on the register, you could say either:
"Took meal orders from teenagers and obese adults"
OR
"Determined and met a variety of client needs"
The two statements describe the same activity, but which do you think sounds more relevant to a job in construction management?
That was a deliberately extreme example, btw. I'm assuming, or at least hoping, that you have more directly relevant experience to begin with, which will make writing your c.v. much easier.