The British have just recalled their ambassador
=> The British ambassador has just been recalled.

It is not necessary to send the letter today
=> You don't need to send the letter today.

Apples are usually cheaper than oranges
=> Apples are usually not as expensive as oranges.

The Browns are very pleased to be going away on holiday
=> The Browns are looking forward to going away on holiday.

He was too weak to lift that box
=> He was not strong enough to lift that box.

My friend doesn't visit you because she is away on business.
=> If my friend visited you, it would be because she is away on business.

They isn't taught in this school
=> They are not taught in this school.

Santa Claus gives children presents on Christmas Eve.
=> Presents are given to children by Santa Claus on Christmas Eve.

Ba invited Liz to the rice cooking festival
=> Liz was invited to the rice cooking festival by Ba.

How often are these animals fed?
=> How often do these animals get fed?

They held the festival in the communal house yard
=> The festival was held in the communal house yard.

Please do not smoke in this area
=> People are not allowed to smoke in this area.

Sarah is better at chemistry than Susan
=> Susan is not as good at chemistry as Sarah.

39... has been recalled
40...have to send...
41.more expensive than oranges.
42...to going away on holiday,
43.strong enough to lift that box.
44.wasn't on bussiness, she would visit you.
45.don't study in this school.
46.are given on Chrismast Eve by Santa Claus.

39. The British ambassador has just been recalled.
40. You don't need to send the letter today.
41. Apples are usually not as expensive as oranges.
42. The Browns are looking forward to going away on holiday.
43. He was not strong enough to lift that box.
44. If my friend didn't visit you, it would be because she is away on business.
45. They are not taught in this school.
46. Presents are given to children by Santa Claus on Christmas Eve.
47. Liz was invited to the rice cooking festival by Ba.
48. How often do these animals get fed?
49. The festival was held in the communal house yard.
50. People are not allowed to smoke in this area.
51. Susan isn't as good at chemistry as Sarah.