Anything on your mind

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Across
  1. 2. Most of them want it all the days of a work week. But can't get it
  2. 4. Do you have any question?
  3. 6. Most of the times you use me and make me pay your bills
  4. 7. I have branches, but no fruit, trunk or leaves
Down
  1. 1. I am always running, but never get tired or hot.
  2. 3. Car which can climb on 45deg slope
  3. 5. I follow you sometimes. But, you can't follow me
  4. 6. I run with less than 2% carbon