一、从方框中选择合适的单词，并用其适当形式填空。(可重复使用)

1. Each of us should the class rules.
2. We must cross the road . It's not to play on the road.
3. I think English is an subject. I can learn it well .
4. Look! The children the road with their teachers.
5. We mustn't run on the road.

一、1. follow 2. safely, safe 3. easy, easily 4. are crossing 5. quickly

二、按要求完成句子或对话。
1. —Must I finish my work today?(作否定回答) —No， .
2. Everyone in the class must follow the classroom rules.(对画线部分提问)
everyone in the class ?
3. Mike can ride a bike well.(改为否定句) Mike a bike well.
4. They mustn't skate on the road. They mustn't run on the road.(合并为一句)
They on the road.

二、1. you needn't 2. What must, do 3. can't ride 4. mustn't skate or run

三、观察图中人物的行为，用 can，must 或 mustn't 给他们提出合理的建议。

1. If you can't find a zebra crossing，you .
2. Can't you see the red light? You .
3. You when you are crossing the road.
4. Stop，boys! You . It's too dangerous.

三、1. can wait on the pavement 2. must stop and wait for the green light 3. mustn't listen to music 4. mustn't play football on the road

四、根据首字母和图片提示，完成地铁站的安全规则条例。
S r of the metro station
At the station：
Be patient. S in line and wait for the metro.
Be friendly. Let passengers get o first.
Don't rush onto the metro. It is d.
When you hear a “beep” sound/When the light is flashing，don't get on the metro.
If the door is closed，wait for a metro.

On the metro：
Don't eat or d on the metro. It makes the metro d.
Don't run on the metro.
Give up your seat to the o，the disabled or people carrying b.

四、Safety, rules, Stand, off, dangerous, another, drink, dirty, old, babies