1, The book that I was reading yesterday was a love story.
2, The man that you saw in the laboratory is a biologist.
3, I would like to see the trees that the botanist planted last month.
4, The picture of the valley that the geologist likes has been sold.
5, That's the stone that the astronaut brought back from the moon.
6, These are the decaying teeth that need filling.
7, The pupils that study hard will make rapid progress.
8, The person that is sitting next to the principal is a famous scientist.
9, The dresses that my friend wears are beautiful.
10, The children that admired the clowns kept talking about the clowns.