[ Perfect Modals ]
They were laughing so loudly. They ____ been watching a comedy.
A. might not have
B. must have
C. could have
D. can’t have

Random Topics:
Subordinating Conjunctions and Clauses-ing &-ed AdjectivesAdverb Types and TensesPaired ConjunctionQuantifiers and ArticlesVocabulary and UsageAbstract NounsTenses and ComparisonsPast PerfectModal Verbs of Certainty and PossibilityOther quiz:
Vocabulary › ViewACCESSORY: They gave us some accessories.
A. Papers allowing us to enter a country
B. official orders
C. ideas to choose between
D. Extra pieces
Vocabulary and Grammar › View
At the end of our story, “A Job for Valentin”, who is the real lifeguard?
A. Bob Dylan
B. Valentin
C. Maricela
D. Mrs. O’Brien
Grammar › ViewExcuse me. This phone is __________. You forgot to take it with you.
A. your
B. yours
C. mine
D. my
Grammar & Vocabulary › View
The children _______________ softly to one another in the room just now. Their test was about to begin.
A. whisper
B. are whispering
C. have whispered
D. were whispering
