Ответ:
1.Sarah's car isn't working. She is going to rent one
2.Mary is very hungry. She is going to eat a sandwich
3.Kim and Paul are very tired. They are going to sleep
4.Tim is on holiday. He is going to go sightseeing
5.I need to buy some stamps. I am going to go to the post office. Lucy is in Moscow. She is going to visit the Kremlin