How do I display image for questions when using Question Bank?

You will need to insert the imageURL of the image that you wish to use into the Question Bank spreadsheet.

For images from online sources (e.g. Google Image), you can simply right-click on your desired image and select Copy image address. 

For images from your own hard drive, you can visit free third party services such as https://imgbb.com/ > upload your image > click on the image once upload is complete > right-click on the image and select Copy image address.