[ Past Modals ]
When you are almost sure what happened, you use …
A. could have
B. might have
C. must have
D. should have

Random Topics:
Present, Past, and Future TimeAdverbial Clauses of Manner and ResultLinkers and ConjunctionsPrepositions and ArticlesModal Verbs and ConditionalsModals of PredictionGrammar - too & enoughPronounPossessive Nouns with Apostrophes and PronounsPre-intermediateOther quiz:
Relative Clauses › ViewI have a message for people __________ by the traffic chaos.
A. to delay
B. who delay
C. delayed
D. who is delaying
Connectives › View
Natalie likes eating pork _________ beef.
A. and
B. or
C. but
D. so