если все сделаете правильно

1 - a, c, h, b.

2 - d

3 - f

4 - i

has to

don't have to

needn't

don't have to

don't have to

the strongest

the oldest

the best

the highest

the biggest

quietest

more dangerous

smaller

cleaner

students mustn't be late for classes.

students must do the home work on time.

students mustn't talk at the lesson.

students mustn't miss classes.

students must be ready to answer the questions.

students mustn't interrupt the teacher.

1967

Nikolai Nikitin

540 meters

не поняла вопроса.