Ответы и объяснения

The teacher is explaining the new topic.
My bench-mate is listening attentively.
 I am drawing in the copy-book.
 Sasha is talking to Kolya.
 Anya is writing the topic in the copy-book.
 The teacher is giving us a written task.
Half of the group are starting doing the exercise.
The others are sitting without doing anything.
Lina is eating a piece of bun.
Kira is getting 2 in her copy-book.