Ответ:

  1. How do you feel?
  2. Are you smelling what I mean?
  3. I am not making the problem clear.
  4. He is cooking while he is speaking to you.
  5. I see the man who is standing near the window.

Ответ: В вопросах о постоянном состоянии употребляется Present Simple, а для действия, происходящего сейчас, — Present Continuous.