Why there are responses already when I open the survey?

When you opened the survey link and there were answers selected or written already, then the survey maker has turned on the Response Editing option and has turned off the Multiple Responses option.

When someone has forwarded a survey link they have received via email, you will be able to view and change their responses if editing is enabled. Please do not change the responses! Instead, contact the survey maker so he can turn off Response Editing and provide you the correct link.