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  1. our study efforts should focus on whatever subject is most in need of improvement
    2. the company rules demanded that the monthly bills be paid before the end of the month

    s-subject
    op-objectof preposition
    sc-subject complement
    do-direct object

Verified Answer :

DO  Direct Object because "that the monthly bills be paid before the end of the month" can be replaced with  "it" -- a pronoun.  

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