You may use room as you like ____ you clean it up afterwards.

15. It is often said that the joy of travelling is________in arriving at your destination___in
the journey itself.

10. The old building must be saved, ________the cost is.

二：语法和词汇知识（共20小题，每小题1分，满分20分）。
6._________we must keep in mind is that we must protect water and use it wisely.

32. Alice’s father always brings her a nice gift_______he returns home from his business trip.

28. The firm invested approximately 60 million dollars in________it says is the world’s largest bottle-bottle recycling plant.

34. The man showed us so heavy a stone _______ no man can lift.

23. If you want to do the experiment again, you had better be more careful________ you made a mistake.

21. Perseverance is a kind of quality, and that’s ______ it takes to do anything well.

17.  ________ is expected, according to the on-line survey, is that prices of houses will not go up any longer.