Let's play it by ear 
 走一步看一步吧！(到时候再说吧!) 
今天的几个句子是有关下决心的：1.This is the important point.这是关键性的一点。 2.It's extremely important. 这是一件极其重要的事。3.There's no turning back.已经无可挽回了。
更多练习：
妈妈从楼梯上摔下来
A：What’s wrong with you? You look very upset.
你怎么了？你看起来不开心呢。 
B：Nothing. I am looking the scenery out of the window.
没什么，我在看窗外的风景。
A：Don’t cheat me. I am your best friend. I know something happened.
别骗我，我是你最好的朋友，我知道一定发生什么了。
B：It’s my mum. She fell down from the stairs and broke her leg.
是我妈妈，她从楼梯摔了下来，腿摔断了。
A：Oh, I am sorry to hear that. And what did the doctor said?
噢，真的很抱歉。医生怎么说？
B：The doctor said that the leg could be cured, but my mum should       stay in bad for three or four months. And she couldn’t do any heave work.
医生说是可以治愈的，但是我妈妈必须在床上呆三到四个月，她不能做重活了。
A：Oh, but now that she would be cured is the most important. I know you worry about the money. I am sorry that I can’t do any favor for you.
哦，但是现在她能被治愈比较重要啊，我知道你在担心钱的问题，我很抱歉帮不了你。
B：Don’t say that. I am very happy to hear you say that. Let’s play it by ear.
别这么说，我很高兴听到你这么说，走一步看一步吧！ 
A：Maybe we can ask the teachers for help.
也许我们可以找老师帮忙啊。
B：It can only be like that.
只能这样了。