Answer:
Did what I could. Spanish ain't my first language.
Step-by-step explanation:
1. El profesor ya nos explico el experimento cuando el hico la demostracion. (The professor already explained the experiment when he did the demonstration)
2. Tu tu nunca te alejastes en este albergue antes? (Your never stayed in this hostel before, right?)
3. Los estudiantes todavia no resolvieron ningun problema cuando el examen se termino. (the students still didn't solve any problems when the exam was over.)