[ 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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Grammar › ViewA new shopping centre…… next month.
A. will be stolen
B. will be opened
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The police chief was understood __________ broken several laws before he resigned.
A. have
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A. When
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A few years ago, Mike _______ his own fast food restaurant.
A. opens
B. opened
C. has opened
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