29. Last summer we visited the West Lake , ____ Hangzhou is famous in the world.

31. Along with the letter was his promise ____ he would visit me this coming Christmas.

49.    , drink-making techniques, equipment and packaging are exhibited in the exhibition.

60. 回家的感觉真好，可以吃到妈妈亲手做的家乡菜。

19. Only when your identity has been checked ____.

63. 新图书馆比以前的大两倍。

2.

62. 你是在什么时候意识到英语非常值得学习的？

56. 我们应该有远大的志向，不应该安于现状。

32. You have been working on this morning. It‘s time you ____ .

24. ____ five minutes earlier, you could have seen them off.

17. Leave your key with a neighbor ____ you lock yourself out one day.