Topics: Past Perfect or Past Perfect Continuous
When they received the message, they ________ for half an hour.
A. had been studying
B. had studied
C. had study
Select your answer:
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Articles and DeterminersConditionalsPresent Simple and Continuous TenseSimple Present Tense vs Present Continuous TensePast and Past ContinuousPersonal Pronouns and VerbPrefixes SuffixesNoun and PronounObject PronounDo not or Does notOther quiz:
Nouns › ViewThe boy ran fast.
A. Boy
B. Ran
C. The
Grammar › View
Every Friday Jack and Peter ____ their grandmother.
A. visit
B. visiting
C. visits
D. visited