Leveling indicators puzzle

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Across
  1. 4. L cannot be lower than a 3 if he has mastered this verb tense and the simple future tense
  2. 7. level 6 indicator used for making predictions
  3. 9. level 2 indicator with the form BE + present participle
  4. 10. verbs followed by infinitives or gerunds are indicators of what level
Down
  1. 1. level 5 indicator
  2. 2. verb tense targeted by the question "How long have you been a (job title)?"
  3. 3. level 2 indicator used for talking about routines
  4. 5. the second conditional and this conditional are indicators of the same level
  5. 6. mastery of the second conditional indicates what level
  6. 8. leveling indicator prepositions for level 3.5 (3,5)