20 until that they began to learn english

21 until last week that they opened the new supermarket

22 he rushed into the burning house in order that he could save the child

29 of the house is being painted by my father

31 we hurried to school so that wouldn't be late

32 you aren't careful, you will cut.....

33 tony understand the math problem he can solve it

34 i could play basketball

35 are encouraged to grow more rice by government

19, Vietnamese people are said to be friendly.

20, ... not until 1980 that they began to learn english.

21, ... not until last week that they opened the new supermarket. 

22, He rushed into the burning house in order that he could save the child.

23, Not until the end of 2004 was the work on the new bridge completed.

25, She tan hurriedly to the station so as to catch the train.

26, It was not until I told him that he knew the truth.

27, Not until I was ten could I swim.

28, Whales have been hunted by people by at least a thousand years.

29, ...of the house is being painted by my father

30, they rushed into the burning house so as to save the child.

31, we hurried to school so that wouldn't be late

35, If you aren't careful, you will cut yourself with that knife.

36, If Tony understands the math problem,  he can solve it

38, ...i could play basketball

39, ...are encouraged to grow more rice by government

40, It was not until it was repaired that they were allowed to use this room.