Question

You _____ regularly inspect classroom

Answer 1

You should regularly inspect classroom.

A quick FYI :

'Should' is a modal verb commonly used to make recommendations or give advice. Sometimes, it can also be used to express expectations as well as obligation.

Ex: 'When you go to Berlin, you should visit the palaces in Potsdam.'

It may also be used to express something that is probable.

Ex: 'John should be here by 2.00 PM.'