What do you say in these situations?

1.The class is very noisy when the teacher is away for a few minutes.

You say:"_____________The class shouldn't be noisy___________________________"

2.Nam watches too much television but doesn't play any sports.

You say:"_________Nam shouldn't watch too much television and play some sports._______________________________"

3.The examinations are coming, but your classmate, Hung, doesn't study hard enough.

You say:"________________Hung should study hard enough.___________________________________"

4.The pool is very deep, and it also has rocks.

You say:"______The pool is dangerous____________________________________________________"

5.Teasing wild animals is very dangerous.

You say:"__________you shouldn't teas wild animals____________________"