46.　　They t______ dogs for the blind three years ago.

47.　　The man want to travel ______(独自)．

48.　　He has a feeling of ______(满足感)when he helps others.

50.　　Don't ______(扔)the ball in the street.：

time 　If 　interest 　so　 without 　of 　spend 　for 　important 　kinds 　 　 Doing sports is good 51____ our health.,we can relax our body and mind. At the same 52____, we can harden(加强) our muscle and have a good body. 53____ we don't take exercise for a long time, we may easily fall sick.Today school students hardly 54____ much time on sports. Aren't they 55____ in sports? No, they often say they have other more important things to do. 　　 What are these56____ things? Exams! They have to spend much time on all 57____ of exams at school. Because 58____ the pressure(压力) from their parents and teachers, the students have to work harder and spend most of their time on books59____　 that they can get good grades. 　　 In fact, education(教育)can't go 60____ enough exercises, because All work and no play makes Jack a dull boy. If you don't have a strong body, you can never get anything or any great success in your life.

66. 我爷爷给我们讲有关过去的故事和过去的情形是怎么样的。

67. 他划伤了左脚，他尽量不让它沾水。