Сумма положительных чисел а и b равна 50. При каких значениях а и b их произведение будет наибольшим?

 Complete the gaps in the sentensec using passive voice

1. During the last lesson students ...(expose) to some authentic language. 2. At the moment the intensive language courses....(organise). 3. A new French texbook ...(write) recently. 4. Some people think that soon a simplified version of English ...(use) by many people. 5. They said that the book ...(translate) from German in 1989. 7. This article ...(discss) when he arrived at the meeting. 8. The essay should ...( finish) yesterday.

сравни российский и европейский город XVI веке