Complete the sentences.use as or then. 1)the oka is shorter the volga. 2)ben is strong as his brother. 3)andrew is not so tall jack. 4)the weather in spting is more pleasant in late autumn. 5)my bedroom is as comfortable my sitting room. 6)my new book is more interesting the old book. 7)the flowaers on the flowerbed are not so beautiful the roses under the window.