Use the following modal verbs must, have to, can, may 

1. … I open the door, please? 

2. I … not do homework for tomorrow. 

3. She … take you some biscuits if you ask. 

4. They … not go there! It's very dangerous. 

5. My brother …not use a mobile phone because he is very little. 

1. May I open the door, please?

2. I don't do my homework for tomorrow.

3. She can take you cookies if you ask.

4. They don't go there! It is very dangerous.

5. My brother does not use a mobile phone because he is very small.