摘要： -- May I go out now. Dad? -- No. You let your mother know first. A. can B. may C. need D. must
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-- May I go out now. Dad?
-- No. You __ let your mother know first.
A. can B. may C. need D. must
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-- May I go out now. Dad?
-- No. You __ let your mother know first.
A. can B. may C. need D. must
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—May I go out now, Dad?
—No. You _____ let your mother know first.
—No. You _____ let your mother know first.
[ ]
A. can
B. may
C. need
D. must
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B. may
C. need
D. must