问题
选择题
Children under 12 years of age in that country _____ be under adult supervision when in a public library. [ ]
A. must
B. may
C. can
D. need
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Children under 12 years of age in that country _____ be under adult supervision when in a public library. [ ]
A. must
B. may
C. can
D. need
答案：A