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X. Translate the following sentences into English.

1. Першим досягненням науки була парова машина.

2. У деяких напрямках науки Україна є одним зі світових лідерів, наприклад, у кібернетиці, електрозварюванні металів.

3. В Україні створено потужний науково-технічний потенціал.

4. Україна одна з восьми держав світу, що мають необхідний потенціал для створення найсучаснішої авіаційної техніки.

5. На початку 20 століття люди не могли уявити, що таке автомобіль, телевізор чи комп'ютер.

6. У 20 столітті було зроблено більше наукових відкриттів, ніж за всі попередні століття.

7. Наукові відкриття 20 століття стали продуктивною силою, що зумовила зміни в житті людини.

8. Нільс Бор запропонував модель будови атома, де електрони обертаються навколо ядра атома, наче планети навколо Сонця.

GRAMMAR

Using Verb Tenses for Clarity

The various verb tenses allow a speaker or writer to be very specific, not just about when an action occurs, but about whether that action occurs regularly, comes before another action, just keeps going on, or happens once and not again. Verb tenses allow verbs to be very powerful. This verb tenses list summarizes all the tenses for regular verbs:

  1. Past Tense

  • Simple (merely happened at some indefinite time in the past) – I talked.

  • Perfect (action that started and finished in the past) – I had talked.

  • Progressive (ongoing action that happened sometime in the past) – I was talking.

  • Perfect Progressive (ongoing action that started, continued, and finally stopped in the past) – I had been talking.

  1. Present Tense

  • Simple (considered to be happening right now, or which happens regularly) – I talk.

  • Perfect (a finished action, viewed from right now) – I have talked.

  • Progressive (action continuing at this moment, or which starts and goes on for a while, on a regular basis) – I am talking.

  • Perfect Progressive (ongoing action that has recently finished) – I have been talking.

  1. Future Tense

  • Simple (will happen in the future) – I will talk.

  • Perfect (will start and finish in the future, before a second action takes place) – I will have talked.

  • Progressive (will start and continue in the future) – I will be talking.

  • Perfect Progressive (will start and continue in the future, before a specific time) – I will have been talking.

XI. Fill in the gaps with the correct form of the verb. The first one has been done for you.

1. The General Dynamics (now Lockheed-Martin) F-16 entered (enter) service in the late 1970s.

2. Today fly-by-wire control systems _____ (be) common on all advanced fighter aircraft.

3. Since the 1980s, automobiles _____ (use) special purpose computers to control engine operations such as the fuel/air mixture ratio, automatic braking system (ABS) control.

4. Aviation _____ (change) dramatically since William Boeing filled his first production order of Model C Seaplanes for the U.S. Navy during World War I.

5. Six years later the first computer that _____ (can, operate) in real time and run output on video displays came online April 20, 1951.

6. Future airplanes _____ (have) lightweight tanks that hold more hydrogen molecules than anyone can now imagine.

7. Scientists all over the world _____ (work) on plasma reactors for decades.

8. Also major technological changes _____ (occur) in navigational methods based upon quantum leaps in GPS technology, onboard robotics and other automation that will eventually leave pilots behind on some aircraft.

9. Meanwhile Boeing _____ (develop) new airliner with advance systems.

10. IC’s and computer chips _____ (get) smaller and cheaper.

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