Bonjour

a- The teacher can't take the class today. (teacher absent)

b- The class must do exercise 3.

c- The students mustn't copy.

d- They can continue with exercise 4. (if they have time --> can, possibilté)

e- They mustn't forget to do their homework.

f- The students must work in silence.

bonne journée ☺☺☺