[ Modal Verbs of Certainty and Possibility ]
She must ______ all day because I haven’t seen her.
A. have worked
B. be working

Random Topics:
Modal Verbs & Perfect InfinitiveDemonstrative Pronouns and Verb TensesVerbal CommunicationTenses and StructuresGrammar / PronounsPrepositions of Place and TimeComparatives, Superlatives & EquativesTenses & AffixesPresent and Past Simple TenseSimple Present and Present Continuous TensesOther quiz:
Grammar › ViewStephen _____________________ in hospital now if he ____________________________ an accident last week.
A. wouldn’t have been / hadn’t had
B. wouldn’t be / hadn’t had
C. would be / hadn’t had
D. wouldn’t be / ‘d had
Transportation Vocabulary › View
He gripped the ______ tightly as he navigated through the busy streets.
A. Seat belt
B. Traffic jam
C. Steering wheel
D. Gate