Answer:
- The phrase "art history professor" should be set of with commas
Explanation:
the subject in this sentence is "Valentine's mother" "an art history professor just renames the or further describes the subject, ("an art history professor" is talking about "Valentine's mother") therefore it should be separated with commas.
I hope this helps you :)
Uh what paragraphs exactly
1. Our classroom has been decorated by my classmates.
2. All the biscuits have been eaten by children.
3. This land has been bought by property developers.
4. A hand hasn’t been asked to be given to them.
5. A lot of good work has been done by charities in this country.
6. The new bridge has not been build by them yet.
I tried my best, but there are different ways of wording these sentences in passive voice, I hope it helped anyway :)