exchange student

My sister, Jo, is in Austria for exchange student now. She is coming back after two months. I miss her very much. She went there last summer vocation. During several months, she has gained more than 5 kilograms! I hope I can recognize her in the airport. She said she miss food in Taiwan very much, it’s a big question because food in Taiwan must be more delicious than in Austria, it’s hard for her to lost weight.
She has a vocation in whole Europe for three weeks! Jo is a good student, she study their native language, Germany, very hard. I had learned Germany for one year during my high school time, hoping she can teach me more. By the time she comes back to Taiwan, my brother is going to the United States. My brother will be an exchange student, too. His exchange area is Minnesota!