Your answer <span>d) les yes yes</span>
Ella le escribe una carta.
<span>1)<span> Las palabras que terminan en vocal -A, -E, -O; se les debe agregar "-S".</span></span>
Ejemplos:
<span><span>Terminación Singular Plural
</span><span>A <span>la copa </span><span>las copas
</span></span><span><span> la mesa </span><span>las mesas
</span></span><span>E <span>el tigre </span><span>los tigres
</span></span><span><span> la torre </span><span>las torres
</span></span><span>O <span>el curso </span><span>los cursos
</span></span><span><span> el libro </span><span>los libros</span></span></span>
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 :)