小张的姐姐在淘宝网上开了一家网店，她坚持认为：信用度应该由货真价实的商品和优质的服务来获取。她的店铺获得了广大买家的一致好评，卖出的商品每月都在增加。这告诉我们（　　）

①信任的基础永远是诚实                                                                           ②只要讲诚实，就一定能获得成功　

③“做老实人，办老实事”是个人得以立足、事业得以成功的保证　    ④诚信原则要求我们放弃个人利益

A: Hi, Jack. Our speech competition about sports is coming.

B: Yean. I'm ready for it. ____?

A: I have no idea about it. Could you give me some good advice?

B: Well, that depends on your hobby. What's your favorite sport?

A: ____ .

B: Then, you should collect some information about football.

A: ____？

B: You can collect the information by reading newspapers and magazines. And you can also talk about the World Cup in Russia these days.

A: ____.Thank you very much.

B: ____.Bye.

A: Bye-bye.