CR Strategy

Hi buddies!

I am practicing CR questions of the GMATPrep. I am solving them very well, almost all correct, however I cannot eliminate the rest of the choices in less than 1:45 minutes. In other words, I almost inmedialy identify the OA, but always I try to eliminate the other choices because I want to be sure that I answered well and because I know that there are questions that probably have two choices that perform the task required. But doing that consumes a lot of time.

Is my strategy correct?, or could I just choose the OA and move on? , what could I do to improve my speed?

Thanks!