20. A bus A only once a week; B from the outer world.
A. 1. was coming to that small village
2. to that small village was coming
3. came to that small village
4. to that small village comes
B. 1. however, its inhabitants were almost completely cut off
2. moreover, its inhabitants were cut off most completely
3. similarly, its inhabitants were cut off most completely
4. therefore, its inhabitants were almost completely cut off