[ Modal Verbs ]
They __________ known about the event if they had checked their emails.
A. must have known
B. could have know
C. could have known
D. must have knew

Random Topics:
Simple Future - WillQuestion WordsGrammar PhrasesPerfect TensePresent Forms and Narrative TensesActive vs. Passive VoicePresent Simple and Present ContinuousVerb AgreementAdverbial Clause of MannerPrepositionsOther quiz:
Reported Speech and Tenses › ViewChoose the correct past simple form: He __________ (start) his new job last month.
A. started
B. starts
C. starting
Comparison › View
My bedroom is ……. room in my house.
A. tidier than
B. the tidiest
C. the most tidy
D. more tidier
Conjunctions › ViewDo you want to eat pasta ___________ rice for dinner?
A. and
B. but
C. because
D. or
Vocabulary › View
He is a faithful friend, and always support me when things go wrong
A. Ambitious
B. Care
C. Loyal
D. Sociable
