1. The man standing there is a clown.
2. The envelop lies 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, being 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 the hieu 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.