Translation of retorno

Her students are using the software and learning with the website afterwards on a regular basis. She is very satisfied and she was kind and gave me your number, as she thought that it may interest you.
The climb was much exhausting than I had presumed. I had forgotten that we were at high altitude where there is less oxygen and that every step required double effort. It was a great exercise.
We were Lao Cai around six o'clock but the train left only at eight. I was somehow relieved though that we had all the dangerous bus journeys behind us and that we left this lovely place soon.