[ Continuous Tenses ]
Yesterday at this time, they …. on their project.
A. are working
B. were working
C. worked
D. work

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Sentences and Non SentencesTOEFL Adjective and AdverbTenses - Pasive VoiceIdiomsNoun / Pronounmust/shouldPoetry VocabularyHave toNouns, Pronouns, Antecedents, and Singular and PluralGrammar & VocabOther quiz:
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A. going
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The musician ____ performed at the concert is well-known in the jazz community.
A. whose
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Are you coming to ______ party next Saturday?
A. a
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