kcalpesh, could you please tell me more about what are you searching?
I solved my problem by doing the following things.
1. When I want to show the AD, I will have 2 Javascript lines (Browser > Execute Javascript). The first one is: "cr_setSuspended(true);" that will suspend (pause) the game and the next is "window[preroll.config.loaderObjectName].refetchAd();" that will fetch my AD.
2. After I export the game, I will add in the index.html file, in header, the AD, like this:
<script type="text/javascript" src="example.iframe.conf.js"></script>
<script type="text/javascript" src="example.js"></script>
Those two scripts are provided by our partners, Google Certificate Partners that manage our Adsense account. I don't know more about them.