Curving a text

I have a question about curving a text.

 

How can I curve the text inside the circle?

also, when I type a text on the circle, how would i flip it?

If you mean apply text to a path (circle in this case), there are buttons in Property Bar to flip (mirror) the text.

To move it to the inside, just drag the text around or up and down with the red "diamond" visible at the beginning of the text string. There are also fields in the Property Bar to adjust "Distance from path" and "Offset".
If you press Shift while dragging the text, it will be locked from moving vertically.

Hope this will guide you in the right direction.

As Ronny said, you can use the option to mirror text.

Here is a screenshot of the property bar.

Thanks for the tips

 

another, Since I draw an eclipse (where I place my curve text) there is now a circle eclipse on my image, how can I remove /hide it?

Give the ellipse no fill and no outline colour (or the same colour outline as the background).

Besides Roy's answer, what I always do, is when I am satisfied with the curved text, is to convert the text and ellipse to curves, break apart and delete the elipse.

(You will find that there many ways to accomplish the same goal, with CorelDRAW, just find one that is comfortable for you and use it.)

Tokiya:

Since I draw an eclipse (where I place my curve text) there is now a circle eclipse on my image, how can I remove /hide it?

It is possible to simply delete the ellipse, the text will still be curved, but I strongly advise you not to do that. It may cause problems when reopened, in future versions or if the exact same font isn't available when you open the file.
For future editing, leave the curve and just give it no fill, no outline like Roy said.
To make 100% sure you don't get any problems and if you're sure you never want to edit the text, convert it to curves like Hugh said.
Or why not add a page where you have a text version and then convert the first one to curves. Best of both worlds (often do that myself).