[ Grammar ]
Dogs _____ as pets for centuries.
A. Were kept
B. Are kept
C. Have kept
D. Have been kept

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Identify The TensesGerund after Prepositions and Certain VerbsPassive Voice in Past and Present TenseSpeech TensesTravel VocabularySimple Past TenseConjunctions & InterjectionsPast, Present, FutureComparisionsGrammar - Present Perfect with already, just, yetOther quiz:
Tenses › ViewWhile George and John ____ the room, Anna ____ some snacks.
A. were decorating – prepared
B. decorated – was preparing
C. were decorating – had prepared
D. were decorating – was preparing
To Infinitive/Bare Infinitive/Gerunds › View
It was a nasty memory. Do you remember both of us wearing sunglasses to avoid ————– bythe supervisors?
A. to recognize
B. to be recognized
C. recognizing
D. being recognized
Indefinite and Intensive Noun › ViewThe mouse _____ opened the door to the cage.
A. herself
B. oneself
C. themselves
D. itself
Conjunctions › View
Identify the conjunction: Both the sun and the moon shine in the sky.
A. not only…but also
B. both…and
C. either…or
D. neither…nor