Match the sentences and the meaning of the tenses used.1 The cashier didn’t work yesterday.2 The boys have bought tennis rockets at the shop.3 She has just found her list of items.4 Has Mark been shopping for the whole day?a) a recent finished actionb) action in the pastc) a finished action focused on the resultd) an unfinished action with the certain period​

1. The British system of units, the metric system of units and the International system of units (SI) is a system of units of physical quantities, a modern version of the metric system.

2. Everyone who knows arithmetic can learn internation system of SI

3. Before the introduction of the metric system the distance in Russia was measured by versts

4. The conversion to а higher quantity in а metric system is done ...

5. In 1791 the French Academy of Science decided hat public education would be provided and organized

6. The two French scientists took this distance on a line running through Paris and divided it into 10000000 equal parts.

7. Meter was also used to measure time

8. The main advantage of the metric system is the metric system is universal and covers almost all areas of physical phenomena, all branches of the national economy and technology.

9. The unit of mass was defined the kilogram

10.T he SI system is the derivative of the unit of all quantities obtained using equations with numerical coefficients

1.It is important to be a professional in order to have a high social status.
2. Being professional means to have advanced degrees and other
certifications.
3. Professionals have a wealth of knowledge about their work.
4. This knowledge is based on human education.
5. professionals know everything
6.if they do not know something, then they look for information in other sources.
7. sometimes they need someone's help
8.professionals always look confident.
9. People appreciate professionalism and intelligence in them.
10. it is important to earn a professional reputation at work in order to gain trust from superiors