问题
选择题
—You can go to the classroom and ask Mary for help.
—She _______ be in the classroom. I have just seen her on the playground. [ ]
A. must
B. mustn't
C. can't
D. may
答案
答案：C
搜题请搜索小程序“爱下问搜题”
—You can go to the classroom and ask Mary for help.
—She _______ be in the classroom. I have just seen her on the playground. [ ]
A. must
B. mustn't
C. can't
D. may
答案：C