A-A+
No one will be admitted to the briefing room d
问题详情
No one will be admitted to the briefing room during Ms. Palmer"s speech, so it is important that you arrive prior ______ the scheduled start time of 3:30.
A．to
B．than
C．from
D．at请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：表时间介词prior to(在……之前)
