Using relative pronouns or adverbs:
1.The man passed here about half an hour ago.Here rode a red honda
2.The number of people will cause dfficuties for the airport.they will travel next week
3.The people didn't know French. He was speaking to these people
4.He can change the situation. He always likes to do something new
5. Hoan Kiem lake is historical place. Its water is always blue
6. The mother was very sad. Her son was killedin an accident