• Part VI:
34.---> I asked how long it took Linh to school.

35. ---> I wish our teacher was at school.

36. ---> His luggage was discovered under the bridge by someone.

37. --->It was possible for them to plant these roses in the hard soil.

• Part VII: 

39.---> Tim rides a bike safely than cousin.

40.---> I know who she be only after she introduce herself.

=>
VI/
34. I asked Linh how long it took her to go to school.
35. We wish our teacher were at school.
36. His luggage was discovered under the bridge.
37. The motorbike which my sister is cleaning in the garden is mine.
38. It was impossible for them to plant these roses in the hard soil.
VII/
39. Tim rides a bike more safely than his cousin does.
30. Only after she had introduced herself, could I know who she was.