问题
选择题
I can't go to the cinema with you because I _____ stay here until my mother comes back. [ ]
A. can
B. could
C. may
D. must
答案
答案：D
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I can't go to the cinema with you because I _____ stay here until my mother comes back. [ ]
A. can
B. could
C. may
D. must
答案：D