The schedule.originally out last week.had to be cancelled because of the unexpected snow storm．( )A．carriedB．to be carriedC．being carriedD．was carried 题目和参考答案——青夏教育精英家教网—

1．Liu Sijiang （teacher）：The Net improves the speed of communication，but there are many people who lie on it．Therefore，it is natural that some people are（61）worried（worry） about the girl in Nanjing，who made friends with an American teacher by email．
Xu Yong （student）：These days，（62）making（make） friends online is a part of many people's lives．I think we can make good and helpful friends online，just like the girl from Nanjing．So don't be afraid to do （63）whatyou think is right．
Ding Yixiang （student）：As the most（64）important（importance） communication tool at present，the Internet helps us to know and understand world affairs．（65）Itis also easy to make friends with foreigners through your keyboard．（66）However，a"friend"might lie to you．Only if young people can control themselves well and know what is good and what is bad，making friends on the Net should not be（67）aproblem at all．
Zhou Jian （student）：It is hard to say （68）whetheror not it is good to make friends on the Internet．In fact，some bad and harmful things have indeed happened．However，I like to make friends online．I often share my happiness and sadness（69）withmy friends there．They can offer me some advice（70）andtell me how to solve problems when I am in trouble．

18．They mourned （哀痛） for their children，killed in the war．

2．Poinsettias （一品红） are the best-selling potted flowering plant in the United States．Red poinsettias are a traditional part of Christmas celebrations，which is why almost all of them are sold in winter time．
Poinsettias are native to Central America and need warmth to grow．Bright red poinsettias are the best known．But there are about one hundred different kinds．
The flowers of poinsettias are very small．Around the flowers are colorful leaves called bracts （苞片）．These bracts are what give the plants their beauty．
Poinsettias are named for Joel Roberts Poinsett from South Carolina．In 1825President John Quincy Adams chose him to be the United States'first minister to Mexico．Poinsett had an interest in plants．He saw the colorful plants growing in the wild．Wild poinsettias can grow up to four meters tall．He liked them so much that he sent some cuttings back to the United States．
People who are allergic （过敏的） to the liquid produced by rubber trees can develop a mild skin disease from poinsettia plants．Babies and pets that eat poinsettias can get sick．But experts say the plant is not as poisonous as some people think．
In the 1920s，Albert Ecke and his son Paul became interested in poinsettias'ability to flower in winter．Paul thought it would be a good plant to display at Christmas．
They started a farm near Encinitas，California．At first，Paul，and later his son，grew large plants in the fields．Then they sent them to growers by train．
In the 1960s poinsettias could be grown in containers．The Eckes started to sell cuttings from these new plants．Today Ecke Ranch remains a major supplier in the United States and around the world．
67．Poinsettias are used in America mainly forB．
A．preventing diseases
B．celebrations
C．remembering Poinsett
D．making money
68．Which of the following makes poinsettias attractive？D
A．Their cuttings
B．Their branches
C．Their flowers
D．Their bracts
69．When did people begin to grow poinsettias in the fields？C
A．In the 1820s
B．In the 1840s
C．In the 1920s
D．In the 1960s
70．We can learn from the passage thatD．
A．specialists think poinsettias are good for health
B．poinsettias grow well where it is cold and dry
C．Poinsett became interested in plants because of poinsettias
D．the Eckes have made much money from selling poinsettias．

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