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. Exercise will not only lower(A) blood correspondingly(B) but possibly protect(C) against heart attacks(D).
b. No matter how cruel the destiny treats(E) one with tribulation and misfortune(F), it will pressure(G) treat him with happiness(H) and sweetness.