[ Grammar ]
Stella … volunteer at the shelter this weekend; she has to study.
A. mustn’t
B. doesn’t have to
C. can’t
D. couldn’t

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Subject Verb Agreement and Verb TensesVerbal CommunicationGrammar : Structural Common ErrorsModals and ResponsibilitiesGrammar - Present PerfectPreference & Future TenseVerbal PhrasesGerund - to Infinitive Parts of SpeechGrammar of Future PlansOther quiz:
Present Simple or Present Continuous › ViewThe architect ……………………. on her project right now. She’s busy with other things.
A. doesn’t work
B. isn’t working
C. don’t work
Grammar › View
Ryan forgot his backpack at school, ___ he couldn’t do his homework.
A. and
B. so
C. for
D. but