[ Modal ]
The students _____ ask a question to their teacher during the activity.
A. must
B. have to
C. may
D. may not

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Prepositions › ViewThe social worker works …..the poor
A. By
B. Among
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Congress established the Small Business Administration in the _____.
A. 1950’s
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A. When
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A few years ago, Mike _______ his own fast food restaurant.
A. opens
B. opened
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D. was opening
