If you have a large number of options for a multiple choice, grid, scale or tick box question, you can copy and paste existing text into the form, rather than having to retype it. Any text in a Google doc, sheet or slide, or even a non-Google file e.g. an Excel worksheet, can be copied and pasted into the form. 

To copy and paste existing text into a form:

For example, copy the following Excel spreadsheet range using Ctrl C: