The correct answer is the introduction
Thesis sentences for almost all types of texts are located in the introduction. Usually the exceptions where it's not are rare.
Answer:
4. Were you able to arrange
5. We are not able to answer
6. Are we able to get
7. I'd love to be able to play
8. We really enjoy being able to swim
Explanation:
just insert the words where they make sense (and change the tenses)