问题
选择题
If you ________ smoke, please go outside.[ ]
A. can
B. should
C. must
D. may
答案
答案：C
搜题请搜索小程序“爱下问搜题”
If you ________ smoke, please go outside.[ ]
A. can
B. should
C. must
D. may
答案：C