Переведите : 1. все ученики должны выполнять . 2. учительница сказала, что оля ученица. 3. саша постоянно отстает от класса по .

1 All students (=pupils) must do their homework.
2 The teacher said that Olga was a very good (=gifted) pupil.
3 Sasha is constantly behind the rest of his class in Physics.

Я как понимаю тебе надо это по английски. 
1.all students must complete homework assignments.
2.The teacher said that Olga is very apt pupil.
3.Sasha always lags behind the class in physics.