— Don't be late again. The meeting for 15 minutes.
A:has begun
B:has stopped
C:has been on
D:has finished
关于人体内等位基因的说法,正确的是( )
—Let's buy tomorrow.
①努力掌握所需商品或者服务的知识和使用技能
②接受商家打折但不开发票的建议
③善于识别消费陷阱,提防上当受骗
④受到不法侵害后,向消费者协会提起诉讼