Correct errors, if any, in the following sentences: Eg.: The board of director is shaking heads at the chairman's speech 改为: The board of directors are shaking heads at the chairman's speech 1. The merchandises have arrived undamaged. 2. On hearing the death of my professor, I sent my sympathy. 3. He is relating to the children his experience as explorer. 4. The Middle Ages ( 中世纪 ) was a time of Feudal rivalries. 5. The clipping of the hedges was usually burnt. 6. There were some looker-ons by the roadside, but they didn’t inform the police of the accident. 7. I like to stay long in the park. The green foliages are really restful. 8. In the garden she took a lot of photography. 9. We will have to finish a 12-pages assignment in a week. 10. Lugguages are not allowed to be left here. 请编辑答案或手写答案后拍照上传!