[ Tenses ]
Which tense is used to describe a past action that continued until another action occurred?
A. Present perfect progressive
B. Past perfect progressive
C. Future perfect progressive
D. Simple past tense

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Prepositions Of PlaceFirst and Second ConditionalModal and Phrasal VerbsPersonificationModals and ConditionalsState Verbs and Action VerbsSimple and Past TensesVerb PhraseDefinite and Indefinite ArticleNouns & PronounsOther quiz:
Grammar › ViewIn descriptions of appearance, Jook can’t be used in both simple and continuous. Like:
Jim Jooks iiI. / Helen is looking well.
A. Yess
B. No
Tenses › View
By the year 2030, they _____ (invent) a device for doing homework.
A. will have invented
B. will be inventing
C. will invent
D. are going to invent