Ответ:

1. You should brush your teeth every day

2.can you help me to cook the dinner?

3.you must not drop litter on the street

4. you do not have to buy this steal bread

5.you should take cough syrup when you are ill

Ответ:

3. You must not drop litter in the street.

4. You have to buy this bread, don't steal.

5. When you are ill, you should take cough syrup.

1. me

2. us