Which sentence shows that something is necessary?

A: __________ (bankers / work) long hours? B: It depends. Some only work when the bank is open, so they ________ (work) long hours. But some help people decide what to do with their money. Those bankers work very long hours!

Nurses _______ work long hours – most work for 12 to 24 hours at a time. And they _______ take long breaks – most of their breaks are between 15 and 30 minutes.

In many countries, you ______ (go) to university to be an electrician, but you usually ______ (have) some experience to get a job.

Which sentence is about a RULE showing that something is necessary?

A: __________ (nurses / earn) a good salary? B: Yes, they _______ , as long as they have good qualifications.

STUDENT: __________ eat my lunch in class? I'm really hungry! TEACHER: No. You __________ eat in the classroom. The school wants to keep the classrooms clean.

When you visit me at work, bring your ID. Guests at my office _________ (check in) at the security desk. They won't let you in if you don't.

The factory has a rule that all factory workers ______ wear gloves when they are at work, so they don't hurt their hands. Another rule is that they ______ come to work if they are sick. They have to stay at home.

Which sentence shows that something is allowed?

At my office, there isn't a rule about when we take breaks – we ______ (take) breaks whenever we need them. But we ______ (leave) early, unless our boss says it's OK.

My office doesn't have rules about what we wear. You _______ wear a suit if you want to, but you _________ .