[ Modal Verbs ]
You have such a beautiful voice. You ______ sing for us!
A. must
B. mustn’t
C. may
D. may not

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Grammar › ViewThe word “already” is used in:
A. Past simple
B. Present perfect
Grammar › View
Olden days ships relied HEAVILY on the wind in order to move quickly.
A. adjective
B. adverb
C. verb