2.The envelop lying on the table has no stamp on it
3.Benzene, discovered by Faraday, became the starting point in the manufacture of many dyes, perfumes and explosives
4.my grandmother, old and sick, never goes out of the house
5.the student don't know how to do exercise given by the teacher yesterday
6.the diagrams made by  young Faraday were sent to Sir Humphry Davy at the end of 1812
7.The gentleman living next door to me is a well- known orator
8.All the astronauts orbiting the earth  in space  capsules  are weightless
9. All students not handing in their papers will fail in the exam
10. I saw many houses destroyed by the storm.
11.The street leading  to the school  is very wide.
12.the  system used here  is very successful.
13.John, teaching my son, is my neighbor.
14.Train leaving from this station take  an hour to get  to London.
15.The candidates sitting for the exams  are all from  Vietnam.
16.we are driving on the road built in 1980.
17.Customers complaining about  the service should  see the manager
18.The city destroyed during the war  has now been rebuilt.