Ответ:

1. Romans made travelling much easier thanks to good roads, didn't they?
2. Did Romans make travelling much easier thanks to good roads?
3. How did Romans make travelling much easier?
4. Who made travelling much easier thanks to good roads?
5. Did Romans make travelling much easier thanks to good roads or thanks to road signs?

1. Medieval roads turned into dirt after rains, didn't they?
2. Did medieval roads turn into dirt after rains?
3. What did medieval roads turn into after rains?
4. What turned into dirt after rains?
5. Did medieval roads turn into dirt after rains or after floods?

1. Europeans learned to use a compass much later than the Chinese, didn't they?
2. Did Europeans learn to use a compass much later than the Chinese?
3. When did Europeans learn to use a compass?
4. Who learned to use a compass much later than the Chinese?
5. Did Europeans learn to use a compass much later than the Chinese or the Japanese?

1. A very good road was running across the countryside, wasn't it?
2. Was a very good road running across the countryside?
3. Where was a very good road running?
4. What was running across the countryside?
5. Was a very good road running across the countryside or the fields?

1. Mike was driving at a very high speed, wasn't he?
2. Was Mike driving at a very high speed?
3. How fast was Mike driving?
4. Who was driving at a very high speed?
5. Was Mike driving at a very high speed or slowly?

1. The heavy snow was falling all day long, wasn't it?
2. Was the heavy snow falling all day long?
3. How long was the heavy snow falling?
4. What was falling all day long?
5. Was the heavy snow falling all day long or for 4 hours?

1. The Greek sailors were making a voyage very far from their lands, weren't they?
2. Were the Greek sailors making a voyage very far from their lands?
3. Where were the Greek sailors making a voyage?
4. Who was making a voyage very far from their lands?
5. Were the Greek sailors making a voyage very far from their lands or near their lands?