26. Benzene, which was discovered by Faraday, became the starting point in the manufacture of many dyes, perfumes and explosives.
Benzene ____________________________________________
27. My grandmother, who is old and sick, never goes out of the house.
My grandmother__________________________________
28. The student don't know how to do exercise which were given by the teacher yesterday.
The student _______________________________
29. The diagrams which were made by young Faraday were sent to Sir Humphry Davy at the end of 1812.
The diagram _____________________________
30. The gentleman who lives next door to me is a well-known orator.
The gentleman _____________________________
31. All the astronauts who are orbiting the earth in space capsules are weightless.
All the astronausts ________________________
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