新概念英語第二冊第80課課文詳注 further notes on the text
1． which was built in hyde park…
這是一個非限定性關(guān)系從句，修飾逗號前的 the crystal palace。
這個從句如果去掉并不影響主句的意思。
2．it was one of the biggest buildings of all time…它是有史以來高大的建筑物之一……
of all time表示"有史以來"、"空前的"，常與形容詞的高級連用，表示范圍：
he is one of the greatest men of all time. 他是有史以來偉大的人物之一。
one of+高級+復(fù)數(shù)名詞結(jié)構(gòu)的語氣比直接用形容詞高級+名詞結(jié)構(gòu)要緩和些，不那么絕對。試比較：
3．there was also a great deal of machinery on display. 參展的還有很多機器。
（1）machinery為"機器"、"機械裝置"的總稱，是集合名詞，要與單數(shù)動詞搭配。某個具體的機器可用 machine或者 a piece of machinery來表示：
this is a wonderful piece of machinery/a wonderful machine. 這是一臺奇妙的機器。
there is a lot of new machinery/there are many new machines in our factory. 我們廠里有許多新機器。
（2）on display與下面一句話中的 on show同義，都表示"陳列著"、"展示著"，在句子中可以作狀語、定語或表語等：
at the great exhibition, a great many goods were on display/show. 世界博覽會上展出了大量的商品。（表語）
this is the best dress on display/show. 這是展出的好的衣服。（定語）
shall we put all these flowers on display/show? 我們要把所有這些花都陳列出來嗎？（賓語補足語）
4． there were six million visitors in all…參觀的人數(shù)總共是 600 萬……
in all為固定短語，其含義之一為"總共"、"合計"：
i paid him ￡ 200 in all. 我一共付給他200英鎊。
at the wedding there were over 100 people in all. 參加婚禮的共有一百多人。
5. it remained one of the most famous buildings in the world…它 一直是世界上的建筑物之一……
remain在這里作系動詞，表示"保持不變"、"仍然"（后面可跟形容詞、名詞、動名詞等）：
why did you remain silent/quiet at the dinner party? 你在宴會上為何一言不發(fā)？
they all remained standing while the manager talked. 經(jīng)理講話時他們一直站著。
新概念英語第二冊第81課重點詞匯學習 word study
1．profit
（1）n．利潤，贏利；得益：
stores haven't made as much profit as usual this year. 今年商店的贏利不如往常多。（不可數(shù)名詞）
the profits from the exhibition were used to build museums and colleges. 博覽會的贏利用來建造博物館和高等學校。（可數(shù)名詞）
（2）vi．獲益，得益；獲利：
i have profited much from your advice/this book/living abroad. 你的建議／這本書／生活在國外使我獲益匪淺。
2．與on有關(guān)的介詞短語
在課文評注3中我們學習了on display/show。on還可以與其他一些名詞組成介詞短語，常見的有：
（1）on business,因公（與 for pleasure相對）：
last month he went to new york on business and had little time to visit friends. 他上月因公事去紐約，幾乎沒有時間拜訪朋友。
（2）on foot,步行（與by bus, by car, by air等相對）：
i usually go to work by car, but this morning i went on foot. 我通常開車去上班，但今天上午我是步行去的。
（3）on duty,值班，值班的：
it was sunday and there was only one doctor on duty. 那天是星期天，只有一位醫(yī)生在值班。
（4）on the whole,總的看來，總的來說，大體上：
on the whole, he is a hard-working student. 總的來說，他是個用功的學生。
（5）on fire，起火，著火：
soon the whole building was on fire. 整個大樓很快便都著火了。
（6）on purpose，故意地，有意地，特意地（與by chance相對）：
they have come here on purpose to see you． 他們特意來看望你。
she broke the vase on purpose． 她故意把花瓶打碎。
（7）on the average，平均，通常：
on the average, he works more than ten hours a day． 他平均每天要工作十多個小時。
（8）on any account，無論如何，不管怎么說（通常用于否定句）：
do not interrupt him on any account． 你一定不要打斷他（的話）。
（9）on second thought（s），經(jīng)重新考慮后（thought用單數(shù)或復(fù)數(shù)均可）：
i intended to go to the party, but on second thought(s), i decided to stay at home． 我原打算去參加聚會，但經(jīng)過重新考慮，決定呆在家里。
新概念英語第二冊第81課課后練習答案 key to written exercises
1．關(guān)鍵句型練習答案
a the most extraordinary building of the nineteenth century (1.1); one of the biggest buildings of all time (11.4-5), the most wonderful piece of machinery on show (11.8-9); travelling was not as easy as it is today (1.9); one of the most famous buildings in the world (1.13)
2．難點練習答案
1 on duty 2 on second thoughts 3 on purpose
4 on foot 5 on the whole 6 on any account
7 on the average
3．多項選擇題答案
1c 2b 3d 4a 5d 6c
7a 8d 9c 10c 11d 12b
1． which was built in hyde park…
這是一個非限定性關(guān)系從句，修飾逗號前的 the crystal palace。
這個從句如果去掉并不影響主句的意思。
2．it was one of the biggest buildings of all time…它是有史以來高大的建筑物之一……
of all time表示"有史以來"、"空前的"，常與形容詞的高級連用，表示范圍：
he is one of the greatest men of all time. 他是有史以來偉大的人物之一。
one of+高級+復(fù)數(shù)名詞結(jié)構(gòu)的語氣比直接用形容詞高級+名詞結(jié)構(gòu)要緩和些，不那么絕對。試比較：
3．there was also a great deal of machinery on display. 參展的還有很多機器。
（1）machinery為"機器"、"機械裝置"的總稱，是集合名詞，要與單數(shù)動詞搭配。某個具體的機器可用 machine或者 a piece of machinery來表示：
this is a wonderful piece of machinery/a wonderful machine. 這是一臺奇妙的機器。
there is a lot of new machinery/there are many new machines in our factory. 我們廠里有許多新機器。
（2）on display與下面一句話中的 on show同義，都表示"陳列著"、"展示著"，在句子中可以作狀語、定語或表語等：
at the great exhibition, a great many goods were on display/show. 世界博覽會上展出了大量的商品。（表語）
this is the best dress on display/show. 這是展出的好的衣服。（定語）
shall we put all these flowers on display/show? 我們要把所有這些花都陳列出來嗎？（賓語補足語）
4． there were six million visitors in all…參觀的人數(shù)總共是 600 萬……
in all為固定短語，其含義之一為"總共"、"合計"：
i paid him ￡ 200 in all. 我一共付給他200英鎊。
at the wedding there were over 100 people in all. 參加婚禮的共有一百多人。
5. it remained one of the most famous buildings in the world…它 一直是世界上的建筑物之一……
remain在這里作系動詞，表示"保持不變"、"仍然"（后面可跟形容詞、名詞、動名詞等）：
why did you remain silent/quiet at the dinner party? 你在宴會上為何一言不發(fā)？
they all remained standing while the manager talked. 經(jīng)理講話時他們一直站著。
新概念英語第二冊第81課重點詞匯學習 word study
1．profit
（1）n．利潤，贏利；得益：
stores haven't made as much profit as usual this year. 今年商店的贏利不如往常多。（不可數(shù)名詞）
the profits from the exhibition were used to build museums and colleges. 博覽會的贏利用來建造博物館和高等學校。（可數(shù)名詞）
（2）vi．獲益，得益；獲利：
i have profited much from your advice/this book/living abroad. 你的建議／這本書／生活在國外使我獲益匪淺。
2．與on有關(guān)的介詞短語
在課文評注3中我們學習了on display/show。on還可以與其他一些名詞組成介詞短語，常見的有：
（1）on business,因公（與 for pleasure相對）：
last month he went to new york on business and had little time to visit friends. 他上月因公事去紐約，幾乎沒有時間拜訪朋友。
（2）on foot,步行（與by bus, by car, by air等相對）：
i usually go to work by car, but this morning i went on foot. 我通常開車去上班，但今天上午我是步行去的。
（3）on duty,值班，值班的：
it was sunday and there was only one doctor on duty. 那天是星期天，只有一位醫(yī)生在值班。
（4）on the whole,總的看來，總的來說，大體上：
on the whole, he is a hard-working student. 總的來說，他是個用功的學生。
（5）on fire，起火，著火：
soon the whole building was on fire. 整個大樓很快便都著火了。
（6）on purpose，故意地，有意地，特意地（與by chance相對）：
they have come here on purpose to see you． 他們特意來看望你。
she broke the vase on purpose． 她故意把花瓶打碎。
（7）on the average，平均，通常：
on the average, he works more than ten hours a day． 他平均每天要工作十多個小時。
（8）on any account，無論如何，不管怎么說（通常用于否定句）：
do not interrupt him on any account． 你一定不要打斷他（的話）。
（9）on second thought（s），經(jīng)重新考慮后（thought用單數(shù)或復(fù)數(shù)均可）：
i intended to go to the party, but on second thought(s), i decided to stay at home． 我原打算去參加聚會，但經(jīng)過重新考慮，決定呆在家里。
新概念英語第二冊第81課課后練習答案 key to written exercises
1．關(guān)鍵句型練習答案
a the most extraordinary building of the nineteenth century (1.1); one of the biggest buildings of all time (11.4-5), the most wonderful piece of machinery on show (11.8-9); travelling was not as easy as it is today (1.9); one of the most famous buildings in the world (1.13)
2．難點練習答案
1 on duty 2 on second thoughts 3 on purpose
4 on foot 5 on the whole 6 on any account
7 on the average
3．多項選擇題答案
1c 2b 3d 4a 5d 6c
7a 8d 9c 10c 11d 12b