Mark Zuckerberg and his classmates ________ Facebook while he ________ ...

[ Grammar ]

Mark Zuckerberg and his classmates ________ Facebook while he ________ Harvard University.

A. invented / attended

B. were inventing / attended

C. invented / was attending

D. were inventing / was attending

Select your answer:

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Connectors Future Tense Much, many, a lot of, a few, a little Prepositions and Conjunctions Gerund & Infinitive Simple and Progressive Verb Tenses Punctuations Stative Verbs and Tenses Question Tags

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