[ Modal Verbs ]
I’m sure he knew all about the secret because he was there when we were talking
A. He must be knowing all about the secret because he was there when we were talking.
B. He should have known all about the secret because he was there when we were talking
C. He must have known all about the secret because he was there when we were talking.
D. He might have known all about the secret because he was there when we were talking.

Random Topics:
Sentences vs Run-OnsPhrasesPreposition & GerundVerb TensesIntensifiers: Really vs VeryGrammar - Collective NounsPast Tense and Perfect TensePassive Voice & TensesVerb Tenses and Sentence StructureAdjective and AdverbOther quiz:
Conditional Tenses › ViewIf he falls from that ladder, he _____ (hurt) himself.
A. hurts
B. will hurt
Transportation Vocabulary › View
It’s dangerous to ______ vehicles on a narrow road.
A. Fare
B. Miss
C. Overtake
D. Platform
Homonyms › ViewBarney dances every night at the ___.
a. review
b. revue
Grammar › View
The dish……….I ordered was delicious.
A. where
B. why
C. that
D. who
