Ответ:

Перевод задания: Продолжите ряды.

  1. foreign writer, more foreign writer, most foreign writer;
  2. easy rule, easier rule, easiest rule;
  3. unusual noise, more unusual noise, most unusual noise;
  4. bad mistake, worse mistake, worst mistake;
  5. old classmate, older classmate, oldest classmate;
  6. often happen to children, more often happen to children, most often happen to children;
  7. poor mark, poorer mark, poorest mark.

В рядах образуются степени сравнения прилагательных и наречия. Для многосложных слов используются more и most, а bad имеет неправильные формы worse и worst.