Complete the sentences with the prepositions: to, by, in, from, about, on or into if necessary.
Example: The English tourist returned to the city ... ship. - The English tourist returned o the city by ship.
1. They travelled ... the comfortable bus round the city.
2. My friends like to learn more ... different places of interest. 
3. In our summer school we tpanslated many texts ... Russian 
4. It was great to get a letter ... you. 
5. Yestarday Kerry and his classmates invited us ... Moskow.
6. My family decided to spend our summer holidays ... Africa.