Circle relative clauses and cross out relative pronouns or adverbs if possible to omit them, as in the example.

1. The town my friend was born in is very small. 2. This is the book I bought yesterday. 3. The old castle located on the mountain is really unusual. 4. A microbiologist is a scientist who studies microorganisms and their effects on people. 5. The microbiologists we met at the conference are from Denmark. 6. A cheetah is a large, wild, cat-like animal which can run very fast. 7. The cheetah we saw at the circus yesterday looked quite friendly. 8. A receptionist is a person whose job is to deal with guests and clients and so on. 9. The last time I went to the planetarium was two years ago. 10. The reason he is so sleepy now is that he didn’t sleep last night at all.