Directions: In the sentence, certain words are in bold and numbered from A to H, which are the possible pairs to be interchanged. Choose the pair(s) of the words that need(s) to be interchanged to make the sentence grammatically correct and meaningful.

a. The chance to transcribe(A) the manuscripts was the most inflation(B) luck, the greatest thing(C) that's ever happened(D) to me.
b. The Treasury has decided(E) to raise interest rates(F) as a pre-emptive measure(G) against fantastic(H).