b3:

4:someone have scattered the dried mushrooms all over the floor

5:they will hold an english speaking contest here nextmonth

b4

1 liz wanted to know what was special about the fire making contest

2 ba said the fire was made in the traditional way 

3liz wanted to know how they decided who won the contest

4 lan said to her mother if she could collect her new ao dai at the tailor

5lan wanted to know if there was anything i wanted her to do while i was out

6 my father told boy to do exercises every moring

7 miss hoa told lan to return the dictonary to the library

8 mr minh asked lan where he was living

9mr minh said to nam if he liked the new school

10 nam said he prefered the new school to the old one

b5

1 the film is watched by mr jones

2 english is spoken in many countries

3 the children can be helped by the policemen

4 the flowers have been watered by mother

5 five hamburgers were eaten by tom and max

6the children were taught by oliver