During the summer holiday, I think I should do something 61. __________ meaningful instead touring. So I got a job at a fast-food 62. __________ restaurant and worked there as cleaner. I worked 7 hours a day 63. __________ for three weeks. The job was hard and bored and seemed endless. 64. __________ It made me so tired that I nearly stopped it halfway. 65. __________ After all, I stuck to it with determinations. Every day I started 66. __________ off for work early in the morning and went to home late in the 67. __________ evening. Finally, I finished the job after the new school term 68. __________ began. Now, I understand that labor means. I think it is really 69. __________ a successful experience, which is worth remembering for ever. 70. __________

70处填（）。