Open the brakets and use the verbs in the correct form. Here I....(to reply) to your letter, which....(to arrive) two days ago, before I....(to

distributed throughout the body of the wire.

2. A reactor is a machine that extracts the energy which was put into radioactive materials at the time the universe was created.

3. Were oxygen present it would combine with the hot tungsten.

4. The pentode, so named because it contains five electrodes, was developed to provide a means to eliminate or minimise secondary emission, an emission of electrons.

5. Since electrons are negative charges, they fly to the plate only when the plate is positive.

6. When alternating voltage is applied to the plate, it becomes alternately positive and negative so that plate current flows only during that half of the time when the plate is positive, and only in one direction.

7. The process by which the signal being transmitted is reproduced from the radio-frequency currents present at the receiver is called detection, or sometimes demodulation.

8. The delay may amount to the time of several cycles although, of course, the output frequency is the same as the input frequency.

9. One way to do this is to vary the amplitude of the radiated wave in accordance with the intelligence which is to be transmitted.

10. That the radio is the fastest and most reliable way to detect artificial satellites is well known to everybody.

The greatest rewards in life go to the risk takers. James McCormick

polluted by cleaning products , dust , insect sprays , cigarette smoke or steam from cooking. We often need to keep doors and windows closed to keep the insides of our houses cool in the summer or warm in the winter . Помогите с переводом! This traps pollutants and can make places for insects dust mites and mould to live. Some pollutants such as smoke and insect sprays can cause breating problem such as asthma , especially for those people who are allergik to dust . To reduce air pollution at home you should open the doors and windows 2-3 times a day use natural cleaning products and do not allow smoking.

walked through the most wonderful parks of every civilized and uncivilized country in the world. I … (sleep) in the finest beds of the most fashionable hotels of the biggest cities of the best countries. I … (eat) the tastiest foods on Earth, I … (spend) long afternoons in the most beautiful gardens of the richest people on Earth drinking green tea, reading the cheapest novels and smoking the most expensive cigars. I … (play) poker with the most famous people - with the Prince of Wales ad with the Countess of Strasbourg. Seven of the wonders I … (see), but the best place for me is Beale Street.

1) We (to pass) the examination if we study hard.

be, is) conducted by a new conductor next month

3 Good and bad feelings (are, were, will be) usually expressed by all people.

4 Three satellites (are, were, will be) launched by Russia last year

5 A new article (is, was, will be) included in this book next year.

6 ' My family (is, was, will be) always consulted by our family lawyer.

7 A lot of countries (are, were, will be) involved into this conflict tomonow.

8 One million dollars (is, was, will be) inherited by Nelson two years ago

9 All the dishes (are, were, will be) usually dried by our dishwasher

10 Cats (are, were, will be) usually chased by dogs

11. The text (is, was, will be) listened to by the pupils at the previous lesson.

12. The shoes (are, were, will be) mended tomorrow by the shoemaker.

13 I (am, was, will be) astonished by this two days ago.

14 Mail (is. was, will be) usually delivered by the postmen.

15 These mistakes (are, were, will be) noticed by the teacher tomorrow.

16. Belts (are, were, will be) fastened a minute ago.

17. Meat (is, was, will be) chopped by the chef in ten minutes.

18. Rules (are, were, will be) usually explained by our grammar teacher.

19. All ingredients (are, were, will be) mixed ten minutes ago.