Dưới đây là phần giới từ được điền vào chỗ trống của bài tập:

49. That man escaped **from** prison.
50. You can't rely **on** the post. It always late.
51. All of you here are capable **of** doing that job.
52. Better methods of refrigeration depend **on** engineers.
53. She is accustomed **to** doing her homework?
54. He's very good **at** telling jokes.
55. Peter was very familiar **with** planting potatoes.
56. Steel is most useful **for** building.
57. What is the reason **for** your absence?
58. I'm really proud **of** my mother.
59. Why are you laughing **at** them?
60. He got back home **from** school at 5 P.M.
61. They are very keen **on** swimming in the river.
62. Who are you waiting **for**?
63. Are you accustomed **to** doing those exercises?
64. Tennis is a very different game **from** football.
65. If you are not careful, you will fall **into** the water.
66. He put his hat ... and left the room. (Câu này thiếu thông tin, cần thêm từ).
67. Four national records were set **in** the Games.
68. They succeeded **in** swimming across the river.
69. I always listen **to** music ... the radio. (Câu này cũng thiếu thông tin, cần thêm từ).

Nếu cần thêm giúp đỡ, hãy cho tôi biết!