阅读短文,在空白处填入一个适当的单词或用所给单词的正确形式填空。
Hi, I'm Tom. I'm a middle school student. School safety is very important to everyone. We learn 1. safety rules in school every month.
I like sports, and our PE class 2. really fun. Before 3. (do) any exercise, our teacher asks us to do warm-up exercises first. This helps us move safely. During class, we must 4. (wear) sports shoes to protect our 5. (foot). We also learn to use the sports equipment(设备) 6. (careful). Last week, my friend Jack ran quickly and fell 7. . He got hurt 8. he didn't look ahead. The teacher helped him at once.
Now we all remember: We should listen to the teacher, follow the rules, and help each other. Keeping 9. (health) is important, 10. staying safe is important too.

1. some/many 2. is 3. doing 4. wear 5. feet 6. carefully 7. down 8. because 9. healthy 10. and

我们逐空结合六年级所学知识点分析：
1. 此处修饰可数名词复数safety rules，表达"一些"的含义，填some符合语境，句意为"我们每个月在学校学习一些安全规则"，填many也符合语义。
2. 主语our PE class是单数，句子为一般现在时，后接形容词fun，需要搭配be动词is，句意为"我们的体育课真的很有趣"。
3. 介词before后要接动名词形式，do的动名词为doing。
4. 情态动词must后必须接动词原形，所以填wear。
5. 此处表示"我们的脚"，人有双脚，需要用foot的复数形式feet。
6. 此处修饰动词use，要使用副词形式，careful对应的副词是carefully，意为"小心地使用运动设备"。
7. 固定短语fall down意为"摔倒"，符合Jack跑得太快摔倒的语境，填down。
8. 后面的分句是"他受伤"的原因，表原因用连词because。
9. 固定搭配keep healthy意为"保持健康"，名词health要变为形容词healthy。
10. 前后两个分句是并列顺承关系，句意为"保持健康很重要，保证安全也很重要"，填并列连词and。