[ Modal Verbs ]
I’m not sure, but we ___ left the keys at the restaurant.
A. had to have
B. mustn’t have
C. might have
D. can’t have

Random Topics:
Conjunctions and Sequence ConnectorsVerb BEParticiple - ing/ edPresent Perfect TenseArticles and NounsZero & First ContidionalLinking WordsPast Perfect Tense and Past TenseAdverbs, Prefixes, and SuffixesPresent Continuous TenseOther quiz:
Adverb Clauses › ViewSome of the subordinate conjunctions can also be _______________.
A. nouns
B. adjectives
C. adverbs
D. prepositions
Grammar › View
The film ‘China Blue’ is a(n) _______ look into the lives of sweatshops.
A. qualified
B. young
C. forgetable
D. eye-opening
Grammar › ViewThe exam was too difficult. It wasn’t ___________________.
A. easy enough
B. too easy
Grammar › View
I strongly ______ that honesty is the best policy in any situation.
A. believe
B. is believing
C. believes
D. are believing
