Answer:
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I am not 100% sure but this is what I think is correct:
5. A.
6. A.
7. A.
8. A.
9. A.
10. B.
The correct pronoun to be used in order to complete the sentence is the pronoun "she". So the complete sentence should be "She was elected to choir office", not the pronoun "it", because the verb "elected" only refers to a person. "It" can't be used to agree with the given verb.
