Answer:
10:00 Matemáticas (tercera)
Explanation:
Translated: My favorite class is Mathematics, I have the class at ___(o' clock).
In the sentence, it gives you a hint on which option to choose from. Their favorite class is Math, and one of the options is Math, at 10:00. Also, the class period is third (tercera).
Hope this helps!
Answer: llegaron
Ellos llegaron a class justo a tiempo
In English: they arrived to class just in time.