1.  It is thought that this citadel have been built in the 18th century

     This citadel is thought to be built in the 18th century

2.  It is believed that this is the biggest sculpture in the area.

     This sculpture is believed to be the biggest in the area.

3. It is agreed that we control the number of visitors to the fortress

We are agreed to control the number of visitors to the fortress

4. It is expected that the government will recognise the importance of national parks.

- The government is expected to have recognised the importance of national parks.

5. It was reported that 500 people visited the art museum last month.

- 500 people were reported to visit the art museum last month.

6. My mother suggested going to Hue that summer holiday 

7. He suggested booking two return tickets because it will be cheaper

8. She suggested we should join efforts to protect the beauty of this citadel

9. Lena suggested we should go to Bach Ma National Park tomorrow

10. I suggested designing a poster to advertise the attraction of this old fishing village

11. The cake is too hard to eat it

12. Lena suggested being a four-Ma National Park tomorrow

    It took me 4 hours to fly from Ho Chi Minh to Bangkok

13.  I don't mind looking after the baby for you

14.  Only when I had left my country, did I realize how much I loved it

15. He is looking forward to going to Greece on holiday.

16. Tom apologized for handing in his report so late

17.  Everyone who visits the town falls in love with it

18. Although he has a good salary, he was unhappy in his job.

19.  He insisted on the manager

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1. It is thought that this citadel was built in the 18th century

This citadel is thought to be built in the 18th century

2. It is believed that it is the biggest sculpture in the area 

 This sculpture is believed to be the biggest in the area.

3.It is argeed that we should control the number of visitors to this fortress

We suggested that we should control the number of visitors to this fortness

4.It is expected that the goverment will recognise the importance of national parks

The government is expected to have recognised the importance of national parks.

5.It was reported that 500 people visited the arts museum last month

500 people were reported to visit the art museum last month.

6.My mother suggested going to Hue this summer holiday 

7.He suggested booking two return tickets because it will be cheaper

8.She suggested joining efforts to protect the beauty of this citadel

9.Lena suggested going to Bach Ma national park tomorrow

10.I suggested designing a poster to advertise the attraction of this old fishing village 

11.The cake was so hard that i couldn't eat it

12.It took me four hours to flight from Ho Chi Minh to Bangkok

13. I don't mind looking after the baby for you.

14.Only after having left my country, did I realize how much I loved it.

15.He is looking forward to going to Greece on holiday.

16.Tom apologized to his boss for handing in his report so late.

17.Everyone who visits the town falls in love with it.

18.Although he had a good salary, he was unhappy in his job.

19.He intested on seeing the manager