с английским,

Упражнение 2. Напишите данные предложения так, чтобы они выражали маловероятное предположение.

Образец: If they get all the necessary material, they will be able to go on with their experiment.

If they got all the necessary material, they would be able to go on with their experiment.

1. If an object passes in front of the eyes, the changes in the intensity of the light stimulate the nerve endings in the eye. 2. If food is taken into the mouth, stimulation of the various receptors in the mucous membrane brings about reflex secretions. 3. If one can make a nerve connection between the sensitive receptor cells of the ear and the area in the brain associated with sight, it will be possible to perceive, or «see» sounds.

Упражнение 3. Напишите данные предложения так, чтобы они выражали упущенную возможность совершить действие.

Образец: If the doctor knows the reason of the patient's trouble, he will help him immediately.

If the doctor had known the reason of the patient's trouble yesterday he would have helped him immediately.

1. If the cerebral cortex in this animal is completely removed, no connection reflexes will be formed at all. 2. If she takes part in the conference, she will make a good report. 3. If we use new apparatus, we shall save much time. 4. If the surgeon on duty does not operate patient N., serious complications may result.​