A. When Peter entered the classroom, he saw that.... 1) there was a new pupil at the desk. 2) all the classmates were sitting at the desks. 3) there was a new teacher at the table.

Правильный ответ: 1) there was a new pupil at the desk. **Объяснение:** В тексте говорится: "Among the crowd of students, he saw a new boy sitting quietly at the back." Это означает, что Питер увидел нового ученика в классе.