1. This sentence can mean two things:
1) A child-teaching expert is going to speak.
2) A child is teaching an expert how to speak.
2. This sentence can mean two things:
1) Dogs have faith in the Rehoming Center.
2) The name of the institution - "Dogs Trust Rehoming Center"
3. This sentence can mean two things:
1) Smoking rooms aren't available
2) Rooms in which there is no smoking are available
4. This sentence can mean two things:
1) Anadin is the fastest working medicine
2) Taking nothing instead of Anadin is the better choice
All of these sentences are ambiguous, meaning that they have at least two opposing meanings.
All things rejoice in youth and love/The fullness of their first delight!
D has the correct punctuation
