2. You mustn't/don't have to open the door for a stranger.

3. A stranger may/should trick you.

4. You mustn't/may tell anyone that you are at home alone.

5. You must/might be sure you know your parents' phone number.

6. It must/have to be useful to know people around you.

hepizor    2   03.12.2020 10:26    1