Student's state of mind

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Across
  1. 2. Cracked the exam!(c t o u s i r o v i)
  2. 6. Why,where,how,when? (...killed the cat)
  3. 8. Eureka!
  4. 9. USP of spies
  5. 10. I know I can bank upon you.
Down
  1. 1. Red marks on the report card!
  2. 3. I will be treated fair and square.(safe)
  3. 4. Sweat it out!
  4. 5. When will this be over? (....to tears)
  5. 7. No one has my exact genotype.