Hi Palash12,
If your Official GMAT is in one week, then you don't have much time remaining. What type of practice resources are you looking for exactly? Just practice CATs or something more?
While it might be tempting to do lots of CATs in this last week, that would NOT be a good idea. Taking CATs at regular intervals is a big part of the overall study process, since doing so helps to point out your weaknesses and (when used correctly) will give you a realistic score assessment. However, taking CATs does not make you a better Test Taker. If you wanted to take 1 more FULL CAT during this last week, then that would be fine, but you shouldn't take more than one (there would be no benefit in doing so).
1) How long have you been studying?
2) What is your goal score?
3) How have you been scoring on your practice CATs (including the Quant and Verbal Scaled Scores)?
GMAT assassins aren't born, they're made,
Rich