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
搜题请搜索小程序“爱下问搜题”
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：D
、
缺失，上颌后缩，下颌前突，前牙反
之间各3mm间隙。