Student or Learner
1. What is the differences in meaning and usage between 'vital to' and 'vital for' ?
2. What is the difference between 'all the time' and 'at all times' in the following example:
While you are in the examination room, you should keep quiet (all the time/ at all times.)
Last edited by stanislaw.masny; 11-Jun-2010 at 12:32.