—— The water changes into thick ice covering rivers and lakes in winter in Harbin. —— ____ in Urumqi and children go skating on it then.
Although punctual himself, the professor was quite used ________ late for his lecture.
Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
______ professional violinsit practises for several hours a day, but ______ violinist has his own way of playing the Beethoven concert.
One more month,________these baby birds will fly out of their nest.
--What do you think of the furniture on exhibition? --Well, great! But I don’t think much of _______ you bought.