Answer:
which book
Explanation:
book talk is mostly done by who/what
I believe the word stories help you wundestand the meaning
1d) was designed (long time ago so past tense)
2d) Has been repaired (It is still going on the present, this year)
3c) Had discovered (He discovered America long time ago)
4a) To have worked (worked long ago when he was young)
Hope it helps!
C , an adverb describes the verb . The verb is impressive . What is in impressive ? C the model bridge is impressive . Therefore C is the adverb .