How do I specify a parameter in the URL?

http://api.stackoverflow.com/0.8/questions works as expected.

Then I would like to pass parameter body with a value of true (that is available according to the documentation for /questions).

I have tried:

http://api.stackoverflow.com/0.8/questions/body{true}

and

http://api.stackoverflow.com/0.8/questions/body(true)