Image filling a Word table cell completely?

[Elisabeth]

I am mac-user, and have tried Apple's substitute for Word - Pages. There is not much good to say about Pages compared to Word for business use, but one thing I miss very much in MS Word:
In Pages, you can fill a cell with an image, as background fill. Now I am struggling to make an image to fit the width of a cell in MS Word, but it just isn't happening.

Any idea of how to get the same width of an image and a cell, and maybe even link them together, so they stay together?

Currently using MS Word 2011 for mac.

Thanks,
Elisabeth