In Eagle, red area(i guess top layer) doesn't appear when i click on ratsnets tool
It sees that while the other answers correctly say how to set up the polygon to be on the correct net and how to display it using the ratsnest tool, they all miss a vital setting. To be fair I wouldn't have figured it either had I not seen your board file.

The issue is with the isolate setting on the polygons:



You currently have an isolate value of 12. In the upper left of the Eagle window it displays the units to be mm. What this means is that there must be 12mm of clearance between the polygon and any copper from another net, hole, or the board outline. As a result the polygon cannot fill because no area of the board which meets this requirement.

If you reduce the isolate setting down to something like 0.4mm, then it does fill correctly.