A.Narcissus is the answer you are looking for.
Here are the answers to the given sentences above:
-N<span>o one answered the ad but me. It is used as PREPOSITION.
-T</span><span>here is but one choice to make in this case. It is used as an ADVERB.
-S</span><span>adie said she would go but she had to bring her sister. It is used as a CONJUNCTION.
Hope this helps.</span>
Answer:
a bear was attacking her in the nightmare
