Class 7 has its first joint lesson with another class. Washinomiya-sensei, the other class' homeroom teacher teaching the cooking lesson, accuses Hibari and her friends of lacking awareness. Refusing to allow her comment to discourage them, the girls continue with the class, but...
Make sure you set the timer 
for it so you don't catch a cold.
احرصا على ضبطِ الموقِّت كي لا تصابا بالرّشح
Und vergesst nicht, den Timer zu stellen.
Sonst erkältet ihr euch.
Mettete il timer però, non fa bene alla salute.
Não é bom para a saúde,
 então ligaremos o timer.