4. Give the corresponding active construction: I. Many interesting experiments are carried out in our laboratory /scientists/ 2. She hopes she will not be refused a visa /the Embassy/. 3. Our room has been papered lately/the decorators/. 4. When I came the last stedent was being examined /the professor/. 5. Monday was agreed upon as the most suitable day for the first rehearsal /the actors/ 6. Problems of vital importance are touched upon in this book. 7. Mothers and children in our country are taken much care of /the government. 8. The document has been signed by the president of the toard. 9. This poem was written by an unknown author.