Read the dialogue and choose the correct options

A: Hi, Paul!

B: Hi, Sam. How are you today?

A: I'm fine, thanks. Have you heard about new rules at school?

B: Yes, sure. When we enter the school, we [have to|has to|don't have to] check our temperature.

A: What about washing hands? [Does we have to|Do we have to|We have to] wash them?

B: No, you [haven't to|don't have to|doesn't have to].

A: But I think we [should|has to|don't have to] wash our hands! It is a very good idea!

B: And we [shouldn't|doesn't have to|must] touch dirty things! It can be dangerous.

A: Thanks for your ideas. We [mustn't|shouldn't|should] follow all these safety rules!