Question: cam and washer: case hardened and black-oxide steel.
Answer: --> Cam and washer: Case hardened and black-oxide steel.

Question: all the farmer's chickens have run away, so he has hired you to catch as many as you can..
Answer: --> All the farmer's chickens have run away, so he has hired you to catch as many as you can..

Question: beautiful and exciting exhibition, but there could have been a few more amphibians and reptiles, snakes less to my taste.
Answer:
--> Beautiful and exciting exhibition, but there could have been a few more amphibians and reptiles, snakes less to my taste.