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.
