[ Modal Verbs ]
Robert can’t come out with us. He _____ work late.
A. have to
B. has to
C. don’t have to
D. mustn’t
Select your answer:
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Grammar › ViewHow long __________ English?
A. do you learn
B. are you learning
C. have you been learning
D. you learn
Vocabulary & Grammar › View
It is the duty of the young people to take_______of their elderly parents.
A. responsibility
B. after
C. place
D. care