[ Grammar ]
By the time we arrived, they (have / clear)……………………….. all the rubbish.
A. have cleared up
B. had cleared up

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Grammar and Vocabulary › ViewYou should concentrate …. your studies.
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Tenses › View
We use _____ to describe an event that happened before the story started or earlier in the story than a main event.
A. Past Simple Tense
B. Past Continuous Tense
C. Past Perfect Tense