[ Tenses ]
My best friend ______ for her exams all afternoon yesterday when suddenly her phone ______.
A. studied, rang
B. was studying, rang
C. studied, was ringing
D. was studying, was ringing

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Sentences and Non SentencesPresent Tense vs Past TenseFuture Continuous TenseTenses & Conditional SentencePresent Perfect vs Past SimpleModals VerbsPreposition FormNoun Clauses with THATPresent simple or Past simpleGerunds + To InfinitiveOther quiz:
Grammar › ViewHe would like to learn how to play _________________________.
A. A guitar
B. The guitar
C. Guitar
Passive Modals in Different Tenses › View
Change the sentence to passive voice in past perfect continuous tense: They had been waiting for a long time.
A. They had been waiting for a long time.
B. They had been being waited for a long time.
C. A long time had been being waited by them.
D. A long time had been waited by them.