42.it takes my mother three hours to do the housework everyday

43.it was such an interesting music that we danced all night

44.because of the heavy rain,we had to cancel the game

45.exhaused was thuy;however she manged to finish her work on time

46.the cat which is playing with the wool is very playful

47.i wish i could dance

48.if she knew the answer,she could tell you

49.he is said to drive carefully

50.no one in your class is better than lan,aren't they?

42. It takes my mother three hours to do the housework every day.

43. It was such exciting music that we danced all night.

44. Because of the heavy rain, we had to cancel the game. 

46. The cat which is playing with the wool is very playful.

47. I wish I could dance.

48. If she knew the answer, she could tell you.

49. He is said to drive carefully.

50. No one in your class is as good as Lan, aren't they?