[ Modals of Advisability ]
They _____ apologize for their mistake.
A. ought to
B. had better
C. must
D. could

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Grammar › View___ (you/buy) your train ticket yet?
A. Have you buyed
B. Have you bought
C. Did you buy
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Fill in the blanks with appropriate articles (a, an, the).
We had __ mulberry tree in the garden.
A. a
B. an
C. the