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?
