1 You shouldn't forget (forget) your parents' birthdays.2 You (look after) the countryside.3 You.... (visit) my city. It's fantastic 4 You.... (swim) in the sea today. It's dangerous.5 You... (help) your parents with housework.6 You (do) more exercise if you want to get fit.7 You... (keep) to the path - there are bears in the wood​

1. You have to look after the countryside.

2. You should (если вы проходили ought to, то здесь он подойдет больше) visit my city. It's fantastic!

3. You mustn't swim in the sea today. It's dangerous.

4. You have to help your parents with housework.

5. You should do more exercise if you want to get fit.

6. You must keep to the path – there are bears in the wood.

Мой английский не perfect, но основываясь на правило, все верно.