Из active voice в passive voice 1)They discuss different problems at the lessons. 2)the builders built a new school. 3) pupils must take exams at the end of each stage of education 4) they will know the result of the tests in a few days.
1 Different problems are discussed at the lessons 2 A new school was built 3 Exams must be taken at the end of each stage of education 4 The result of the test will be known in a few days