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the teacher can’t give attention to each individual student in the class. 8. Read about: learn of sth. By reading I read about the arrival of the foreign guests in today’s newspaper. 9. on : about, concerning A book on physics Take notes on lecture 10. go back to The custom goes back to the seventeenth century. 讓我們回顧一下我們上周所做的事情 . Let’s go back to what we did last week. 有時(shí)當(dāng)你回顧往事的時(shí)候 ,你會(huì)感到很有趣 . Sometimes when you go back to the past, you’ll have a lot of fun. of : be told, be informed of I am quite s