Build a Website

I am looking for a website that contains following features : 1.) Online Tests with facilities that admin can add more tests , add questions. 2.) General forum for discussions. 3.) A link where user will select a department ( Drop Down Menu ) - will write his query and submit and the query will be sent to the specific department's mail id and the reply from that mail should reach to the user. All data work will be done from our side. You just need to create the website.