Las respuestas son a d b c e i f h g j
Answer: Hi, Daniel: I'm with Mario in the library. Exams (1) tomorrow. At night Mario and I don't (2) much because we have to study. You (3) how are we, right? I (4) that the exams will be (will be) very difficult. I really want to return to the village. When (5) to the town I can rest. I (6) the town to the city. (7) come back soon.
Explanation: not really an explanation for Spanish but you can always use google translate :)
the answer: son (which means are)
Everything appears to be correct except that your conjugation for “nadar” doesn’t match your pronoun “nosotros.” “Nadan”, as you have it, fits with 3rd person plural (Uds, ellos, ellas), so replace that with “nadamos” and you should be good!
Hope this helps!