The -ible or -able Challenge

10. Which suffix (-ible or -able) should be used to complete the word: 'adapt_ _ _'?

9. The word 'revers' is NOT a complete English verb. Which suffix should be used for 'revers_ _ _'?

8. The base word is 'rely'. Since 'rely' is a complete English verb, which suffix is correct for 'reli_ _ _' (remember to change 'y' to 'i')?

Which word is an exception to the 'full English verb' rule, using -ible even though its root is a complete word?