In 1642 a French student invented the first 13 ______ calculator. He was only 18 and the counting machine was a present for his father. The father worked as a tax collector and the young man wanted to make his job 14 ______.
The talented inventor made several machines but nobody 15 ______ interested. The young man was ahead of his time. Many years passed before people 16 ______ how useful these machines could be and started mass producing them.
Today most mechanical calculators have been 17 ______ with electronic models. These small devices can 18 ______ a lot of mathematical operations. You just need to enter the numbers by pressing the keys and you’ll see the final result on the screen in no time.
Прочитайте текст и заполните пропуски 13–18 словами, напечатанными в правой колонке под цифрами 1–8. Каждое из этих слов может быть использовано только один раз. В ответе укажите цифры, под которыми значатся выбранные Вами слова. Два слова в этом списке 1–8 лишние.
Many years passed before people 16 ______ how useful these machines could be and started mass producing them.
1) realized
2) easier
3) perform
4) wooden
5) was
6) replaced
7) farther
8) mechanical
Правильный ответ указан под номером 1.

