Put the following sentences in a) Past Indefinite Passive; b) Future Indefinite Passive. Add the necessary adverbial modifiers. 1. The engineers are given interesting problems for solving. 2. Automatic tools are used by the operator. З. He is allowed to use a computer. 4. Metals are flowed out into special containers. 5. The experiments with new devices are carried out. 6. Metal is processed in various ways. 7. Any new design of a solar power station is discussed. 8. The problem of computer development is considered by the scientists. 9. The efficiency of this device is increased. 10. The particles of nuclei are studied.

1. The engineers were given interesting problems for solving yesterday.

The engineers will be given interesting problems for solving tomorrow.

2. Automatic tools were used by the operator two days ago.

Automatic tools will be used by the operator in two days.

З. He was allowed to use a computer last night.

He will be allowed to use a computer tomorrow.

4. Metals were flowed out into special containers last week.

Metals will be flowed out into special containers next week.

5. The experiments with new devices were carried out an hour ago.

The experiments with new devices will be carried out in an hour.

6. Metal was processed in various ways last year.

Metal will be processed in various ways next year.

7. Any new design of a solar power station was discussed last week.

Any new design of a solar power station will be discussed next week.

8. The problem of computer development was considered by the scientists yesterday.

The problem of computer development will be considered by the scientists tomorrow.

9. The efficiency of this device was increased last winter.

The efficiency of this device will be increased next summer.

10. The particles of nuclei were studied last year.

The particles of nuclei will be studied next year.