重點講解：
1. in advance
提前；事先；
eg. British Summer Time is one hour in advance of Greenwich Mean Time.
英國的夏季時間比標準時間快一小時Jsh5MtmA(y。
eg. The booking office sells tickets 3 days in advance.
售票處預售3天的票;8g&hyeRBTUz1#Tl。
2. book up
滿號；訂光；
eg. I could not get even one ticket since all the seats were booked up.
我一張票也弄不到，所有的座位都已預定一空.XLJ7#OSd[02oX.。
eg. By now, every place must be booked up.
現(xiàn)在這時候到處都被訂滿了+^Ns1l#T=jUZ+=。
3. depend on
取決（于）；有賴（于）；
eg. The cooking time needed depends on the size of the potato...
所需的烹飪時間取決于土豆的大小+T*CZQ8y#;I%。
eg. What happened later would depend on his talk with De Solina...
日后之事將有賴于他與德索利納的談話結果l#SfPmHPHqpC。
eg. How much it costs depends upon how much you buy.
價錢取決于你買多買少.iD-DwNq)t;|@~-q。