[ Past Perfect Tenses ]
By the time I called, they ___ (leave) the house.
A. had left
B. had leave
C. was leaving
D. have left

Random Topics:
Academic VocabularyModal Verbs in ConditionalsVerbs & Verb TensesModal VerbContinuous and Perfect TensesVerb FormsVerb Tenses and UsageModals of ProhibitionAdverbs by TypePresent Simple & ContinuesOther quiz:
Time Clauses of Future › ViewI/tidy/living room/before/I/go to bed
A. I will tidy the lving room before I go to bed
B. I tidy the living room before I will go o bed
Modal Verb › View
A: I can’t believe Jane isn’t here to collect her award.
B: She ________ the invitation. We definitely should have checked that she had got it.
A. must not have received
B. had better not receive
C. isn’t supposed to receive
D. needn’t have received
