I finished the collection of responses through a Google Form. Now I want to set the survey to read-only, i.e. allowing people to view the form but not submit any more responses.
How can I set a Google Forms survey to read-only?
google forms
You could potentially trick the user with form data validation though its kind of mean as it would still invite them to try and answer but if you set the validation to require something totally  obscure they could never really answer it. If you simply no longer want to receive responses you can disable them and the form will no longer accept responses. Under the Responses tab the first line acccepting responses click that and it will disable your form. (Users will not see it then.) 