[ Grammar and Vocabulary ]
Ancestor worship is ………………….most important religious activity among the Bru-Van Kieu.
A. the
B. a
C. –
Select your answer:

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Modals › ViewThe manager said that you ___ submit that paper work early or you’ll get sacked.
A. must
B. have to
C. ought to
Grammar › View
You ___ call your parents and tell them where you are.
A. should
B. mustn’t
C. can’t
D. can
