[ Past Perfect Tense ]
By the time the teacher ___________, the students _________ the classroom. (arrive, already leave)
A. had arrived / had already left.
B. arrived / had already left.
C. had arrived / already left.

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Too or EnoughGerunds + To InfinitiveMiscellaneous Grammar UsagesGerunds, Infinitives and Modals of PossibilityConditional 0Conditional Sentence Type 1Gerund & InfinitivesAdverb ClausesTransitive or Intransitive VerbsWH Questions and Simple Past TenseOther quiz:
Vocabulary › ViewAny of the problems that a character faces (encounters) in a story
A. Conflict
B. Claim
C. Compare
D. Cause
Grammar › View
Was ________ grammar book expensive?
A. your
B. yours
C. your´s
D. you
