—Honey,the cat's stuck in the tree. Can you turn off the TV and get a ladder...?—Oh,it jumped off.________.
55. All the students envied him _____ having succeeded in the TOFEL test.
54. The football fans cheered their team _____ the entrance _____ the field.
53. Our music teacher often enjoyed _____ playing the violin in his spare time.
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