Оберіть правильний варіант (a, b, c або d), який може бути використано на місці підкресленого слова або словосполучення без зміни змісту речення

21. It is now common corporate policy for a company to have a mission statement explaining the aims of the business.

a) strategic b) domestic c) international d) organizational

22. You should speak more loudly and more slowly when you want to emphasize an important point.

a) introduce b) stress c) discover d) report

23. The North Americans consume more energy and resources than any other nation.

a) use b) generate c)make d) apply

24. One of the most important skills to learn is how to utilize your time effectively.

a) take notice of b) pay attention to c) take care of d) make use of

25. The outcome of the experiment was a complete surprise to everyone.

a) beginning b) start c) result d) launch

26. He is a pleasant colleague, and very proficient at his job.

a) skilled b) profitable c) popular d) active

27. They declared that they had been the first to discover those facts.

a) proposed b) introduced c) stated d) demonstrated

28. The theory proved to be correct and was a major breakthrough in the history of science.

a) true b) valuable c) unique d) false

29. Communication between researchers depends on precise definition of concepts and ideas.

a) faulty b) broad c) accurate d) standard

30. The results obtained signify that we still know very little about these phenomena.

a) convince b) disprove c) guarantee d) indicate