[ Tenses ]
Identify the tense used in the following sentence: They had been studying for the exam when the power went out.
A. Present perfect continuous tense
B. Past perfect tense
C. Past perfect continuous tense
D. Future perfect continuous tense

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Grammar, Conditional Sentences, VocabularyPresent Perfect or Past SimpleWh QuestionsGrammar - FragmentsTenses (Present, Past, Future Forms)Past, Present, FutureSubject Verb Agreement and Coordinating ConjunctionsPresent Simple with Adverbs of FrequencyPresent Perfect ContinuousSentence LabelingOther quiz:
Prepositions of Movement › ViewThe sun went down ____ the horizon.
A. above
B. below
C. between
D. across
Simple Present vs Present Continuous › View
My sister_____________to music
A. listen
B. are litening
C. listens
D. is listening
If Conditional Zero and One › ViewMilk ____ off if you don’t keep it in a cool place.
A. will go
B. go
C. goes
Vocabulary › View
It has a center, an angle, and a direction. It moves every point of a figure in a circle around the center clockwise or counterclockwise, and for a distance specified by the angle.
A. Reflection
B. Rotation
C. Translation
D. Dilation