李雷不知道该如何提高自己的英语听力水平，于是他在校园BBS上留言求助，有四位同学跟帖回答了他的问题。
LiLei: Hi, everyboby. I’m Jimmy. I like English very much, but I really need some advice on listening . Who can help me?
Jenny:  Don’t get nervous before you start to listen to something. You need to relax. This will help.
Dr.Smith:The first sentence tells a lot the whole passage.for example,if, at the beginning , you hear “Welcome back BBC news---”, you know you will hear a piece of news, not a children’s story, or a science report.
Shirley: When you’re listening, try to do some thinking. For example, you can think of the following questions: What happened? When, Where and how? What was the result (结果)and what did the speaker want to tell us? In this way, you may understand the passage better.
Josh:  It’s important for you to remember some important facts. for example, if the passage is a science report , you should try to remember its results and how the scientists got them.
请根据以上内容完成下面任务：以下A-D是针对上述解答内容的提炼，请将它们分别与对应的解答人配对：
A.listen to important facts.        B.listen carefully to the first sentence.
C.Relax yourself.               D.Think when you’re listening.
Jenny:       
Dr.Smith:          
Shirley:           
Josh:               
请您也为李雷提供一条提高英语听力水平的建议（一句话）：