_______you can easily have lunch in the restaurant around the corner, why do you take the trouble to drive many miles here?
52. The struggle against sand storm will not end _____ victory unless we pay much attention to the balance of nature.
51. Don’t put your cell (手机) _____ the edge of the table, or it will fall off
50. The Englishman has a very good ear _____ music. You can ask him for some advice.
49. He goes _____ at 8 a.m. and comes _____ at 5 p.m. Today he is _____.
48. Some new changes happened _____ the school _____ my absence.