4) You use a mobile phone during the lesson.

a) must

5) I... see a dentist. I have a terrible toothache.

a) should

b) may

c) may not

b) may

c) can't 6) The performance... be wonderful. Mademoiselle Ellene is a great actress..

a) can't

b) may not c) must

7) I'm absolutely sure! They... arrive on Monday, I saw their tickets.

a) might

8) It's so cold outside! It... be

b) may 20 degrees below zero!

c) must

b) might to Paris tomorrow. He doesn't c) mustn't have enough money.. 9) Are you joking? Will... go

a) can't

a) can't

b) shouldn't

c) must

10) It's a top secret. You... not tell anybody else.

a) can

b) shouldn't

c) may​

очень срочно, я вас прошу