1:- your website should be complete ( all pages must be complete none of ur page should have remaining parts to be completed) thats why google said ur site is under construction that means some of ur websites pages are not yet completed.

2:- your website should have pages more than 75. your website pages shouldn't be included less than 75 pages, so then google can approve it

3:- you should give your complete 1st and last name when u apply

4:- your mailing address should be complete and detailed (short address wont be accepted). You should use whois detail address for mailing

5- Use genuine content don't copy and paste

6:- your site shouldn't be included nude pictures and adult contents