[ Grammar ]
I have turned in the essay that I had spent several weeks working on.
A. NO CHANGE
B. I have turned in the essay that I have spent several weeks working on.
C. I had turned in the essay that I have spent several weeks working on.
D. I turned in the essay that I will have spent several weeks working on.

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Possessive Adjective and PronounSimple Past ContinuosAdjectives with -ED and -INGContrastive ConjunctionConjunctions, Prepositions and InterjectionsNoun Phrases and AdverbialsVerb TenseModal PerfectMoods of GrammarPast Tense and Past ContinuousOther quiz:
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Grammar and Vocabulary › View
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A. chose
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