重点讲解：
1. happen to sb.
（尤指不愉快的事）发生（在…身上）；（某人）遭到；遇到；
eg. We forget the vast majority of things that happen to us.
我们遗忘了大部分发生在自己身上的事情。
eg. I was worried something might happen to you and looked for you everywhere.
我担心你出什么事情，我到处找你。
2. make sth. clear
把…表达清楚；把…说明白；
eg. He wanted to make it clear that the rumours about his future are pure speculation.
他想澄清那些围绕他的谣言纯粹是无稽之谈。
eg. It's time to make a few things clear.
事到如今有几点必须澄清。
3. on time
准时；按时；
eg. Having been delayed by heavy traffic, she found it important for her to arrive on time.
由于交通堵塞的耽搁，她觉得不可能按时到达了。
eg. If you cannot deliver the goods on time, I shall be obliged to send you to court.
如果你不能按时交货，我就不得不将你告上法庭。
