重點講解：
1. switch to 轉換；改變；轉變；
例句：It'll be all talking heads. I'll go to sleep or switch to the other channel.
電視上盡是講話的人頭，我要去睡覺了，要么就換個頻道TAfSNOmK42[!gU01d。
2. be used to sth./doing sth. 習慣于；
例句：He is used to taking notes of everything he did.
他習慣把他所做的一切事情都記下來#ZD4h&cK~If~h)。
3. go on 進行；發生；
例句：The revelries went on all the night.
狂歡活動通宵達旦xH%3#v6%l*2=。
4. keep track of 跟上…的進展；掌握…的最新消息；
例句：It is important to budget your income so you can keep track of how your money is being spent.
對自己的收入進行預算是很重要的，這樣你就可以清楚把錢花在哪了29u^(*(7T2QAK&h!Vzei。