Снеобходимо выбрать правильную видов ременную форму сказуемого.
заранее
1. the abacus … about 5,000 years ago.
a) has emerged; b) emerged; c) had emerged; d) emerges;
2. the first all-electronic computer … by 1940.
a) developed; b) was developing; c) was developed; d) had been developed;
3. in 1694 pascal’s invention … .
a) was improved; b) improved; c) was improving; d) had improved;
4. the transistor … the large vacuum tube in televisions, radios and computers.
a) replaced; b) replaces; c) was replaced; d) was replacing;
5. scientists … to fit even more components on a single chip very soon.
a) will have managed; b) manage; c) will manage; d) ;
6. in 1830 babbage … to build a general-purpose machine.
a) proposes; b) proposed; c) has proposed; d) had proposed;
7. by the early part of the 20th century electromechanical machines … .
a) had been developed; b) developed; c) had developed; d) were developed;
8. data … a day before yesterday.
a) were being processed; b) are processed; c) processed; d) were processed;
9. we … the term “processing” meaning “data processing”.
a) had used; b) are used; c) use; d) were used;
10. processing … operation on data to convert them into useful information.
a) called; b) is called; c) calls; d) has called;
11. the tested method … to correct further errors.
a) will be employed; b) will employ; c) will have employed; d) will be employing;
12. this technique … now to develop a new computer program.
a) is applied; b) is being applied; c) applies; d) has applied;
13. many computer programs … recently.
a) have created; b) had created; c) have been created; d) are created;
14. next seminar our group … the history of computer development.
a) will be discussing; b) will have discussed; c) will be discussed; d) will discuss;
15. by 1951 the census bureau … the first univac computer.
a) was installed; b) had installed; c) has installed; d) installed.

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Празеодим

4,5(27 оценок)

Rarely (редко), sometimes (иногда), usually (обычно), often (часто), always (всегда)

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