Section_ⅠWelcome to the unit & Reading - Pre­reading

　　Fog①

　　by Bill Lowe

　　Fog warning

　　When Polly left home that morning②， the city was already covered in a grey mist③.At lunch, the radio forecast④ that the mist would become a thick fog in the afternoon⑤.At four o'clock, Polly left work and stepped⑥ out into the fog.She wondered⑦ if the buses would still be running⑧.

　　No buses to King Street

　　Once out in the street⑨， she walked quickly towards her usual bus stop.

　　'How far are you going？' the bus conductor⑩ asked her ⑪before he took her fare⑫.

　　'King Street，' said Polly.

　　'Sorry, Miss，' replied the man, 'the truth is that it is too foggy⑬ for the bus to⑭ run that⑮ far⑯.Take the Underground to Green Park.The weather might be better there and you might be able to get a taxi.'

　　A tall man

　　As Polly observed⑰ the passengers on the train, she had a feeling that she was being watched by a tall man in a dark overcoat⑱.At last the train arrived at Green Park station. While the rest of the passengers were getting out⑲， she glanced⑳ at the faces around her.The tall man was nowhere\s\up1(21(21) to be seen. 　　①fog/fɒɡ/n.雾

　　②when引导时间状语从句。

　　③mist/mIst/n.薄雾；水汽

　　④forecast/'fɔːkɑːst/(forecast, forecast)vt.& n．预测，预报

　　⑤that引导宾语从句。

　　⑥step v．跨步，迈步n.脚步，步骤　step out走出去

　　⑦wonder v．想知道，对......感到疑惑n.惊奇，奇迹，奇观

　　⑧if引导宾语从句，意为"是否"。if也可引导条件状语从句，此时if意为"如果，假如"。

　　⑨省略结构作状语，补充完整为Once she was out in the street。once意为"一......就......"。

　　⑩conductor/kən'dʌktə(r)/n.(公交车)售票员；(乐队)指挥

　　⑪before引导时间状语从句。

　　⑫fare/feə(r)/n.车费

　　⑬foggy/'fɒɡI/adj.有雾的，雾茫茫的

　　⑭too ...to ...太......而不能......

　　⑮that adv.那么，相当于so。

　　⑯that引导表语从句。

　　⑰observe/əb'zɜːv/vt.观察；注意到；评论

　　observe sb.do/doing/done注意到某人做/正在做/做了......

　　⑱overcoat/'əʊvəkəʊt/n.长大衣

　　⑲while引导时间状语从句，意为"在......期间，趁"。

　　⑳glance/ɡlɑːns/vi.& n．瞥一眼，匆匆看

　　glance at瞥见，浏览，迅速地看

　　\s\up1(21(21)nowhere/'nəʊweə(r)/adv.无处，到处都不