（1）What a claan and tidy room ours is!
(2)What a new shirt yours is!
(3)What a long river the Yangtse river is!
(4)What tall trees they are!
(5)What a noisy street it is!
(6)What warm weather it is!
(7)What hardworking students they are!
(8)What beautiful pictures they are!
(1)How thick the dictionary is!
(2)How sweet the voice she has!
(3)How beautiful the flowers are!
(4)How good the idea is !
(5)How heavy the boxes are!
(6)How difficult the exercises are!
(7)How easy the lesson is!
(8)How high the moutains are!
前三句不大确定,后面的应该对了,俺的英语可是不错呦!相信俺吧!