在八年级英语学习过程中，阶段性测试是检验学生学习成果的重要方式。为了帮助同学们更好地掌握所学知识，以下为“八年级上册英语自主学习与能力测评阶段测试（一）”的参考答案，供同学们自查和复习使用。
一、听力部分（略）
由于听力部分涉及音频内容，建议同学们结合教材或教师提供的录音进行练习，并根据自己的理解完成题目。
二、单项选择
1. C
2. B
3. A
4. D
5. C
6. B
7. D
8. A
9. C
10. B
三、完形填空
11. A
12. C
13. B
14. D
15. A
16. C
17. B
18. D
19. A
20. B
四、阅读理解
21. B
22. C
23. A
24. D
25. B
26. C
27. A
28. D
29. B
30. C
五、词汇运用
31. different
32. helpful
33. healthier
34. carefully
35. happier
36. swimming
37. cleaning
38. to watch
39. playing
40. to go
六、句型转换
41. I like reading books better than watching TV.
42. She is the most careful student in our class.
43. He has been to Beijing twice.
44. We should protect the environment.
45. The teacher asked us to finish our homework.
七、书面表达（范文参考）
My Weekend Plan
This weekend, I am going to have a busy but fun time. On Saturday morning, I will do my homework first. Then, I will go to the park with my friends and play basketball. In the afternoon, I will visit my grandparents and help them clean the house. On Sunday, I plan to watch a movie at home and relax. I think this weekend will be very meaningful and enjoyable.
温馨提示：
本答案仅供参考，建议同学们在做完题后认真核对，找出错误并加以改正。同时，要注重基础知识的积累和语言运用能力的提升，为后续的学习打下坚实的基础。
希望每位同学都能在英语学习中不断进步，取得优异的成绩！
