问题详情：
完成句子；根据括号里的汉语和首字母提示，完成下列英语句子。
1. Today he went to school o______ f_______（步行）.
2. We hope you can g______ u______（放弃） smoking. It’s bad for your health.
3. Mike often p______ f_______ （踢足球） with his classmates after school.
4. My classmates and I often go hiking i______ s_______ （在春天）.
5. This is the t______ l_______（第三封信）she has received this week.
【回答】
1. on foot 2. give up 3. plays football
4. in spring 5. third letter
知识点：汉译英
题型：完成句子
