订立保险代理合同的基本原则包括（）
A.保险利益原则
B.合法原则
C.自愿公平原
D.对价有偿原则
E.近因原则
参考答案：B, C, D
More and more teaching _______ are being developed across the globe, which are sure to _______to make classroom teaching more lively and interesting. [ ]
A. aids; help
B. assistance; help
C. aids; assist
D. helps; aid
收寄特快专递邮件时，应将详情单的第（）联交给收件人收执。
A.一
B.二
C.三
D.四
