[ Grammar ]
The boys of that class were able to tidy up the classroom by____________.
A. herself
B. himself
C. ourselves
D. themselves

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Clause Markers TOEFL GrammarPassive Voice with Modal VerbsProgressive Verb TensesFirst ConditionalsDEGREE COMPARISONConjunctions & InterjectionsArticleComparative and Superlative AdjectiveEnglish ArticlePast Simple TensesOther quiz:
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