问题
选择题
Teenagers ___________________ to the bar.[ ]
A. allow to go
B. aren’t allowed to go
C. aren’t allowed going
答案
答案：B
搜题请搜索小程序“爱下问搜题”
Teenagers ___________________ to the bar.[ ]
A. allow to go
B. aren’t allowed to go
C. aren’t allowed going
答案：B
和测量数据，计算金属颗粒的密度。