Hello, the sentence in English is “The teacher teaches the lesson.” Since an indirect object is whom or what an action was done then the answer would be “les” because it refers to those being taught by the teacher.
Estas clases son bonitas pero no muy buenas.
Tren
It is most likely train because spain is known for common transport by trains. Considering that it asks "qué hora sale el próximo" (when the next one comes) it probably isn't talking about a plane.
Answer:
C. va
Explanation:
Look at the conjugated words to help make more sense
