Wisdom teeth are normally the last teeth to appear．This usually happens when people are in their late teen years or early twenties, in other words, when they are older and wiser．
Wisdom teeth can grow into place normally and never cause a problem．But often there is not enough room for them in the mouth; they might crowd other teeth．Sometimes they even push sideways through the gums(齿龈)
An impacted wisdom tooth is one that fails to completely rise through the gums．Wisdom teeth that only partly break through can leave space for bacteria to enter around the teeth．Infection(感染)is a risk in these cases．
Wisdom teeth that are not well lined and become impacted are often removed．The American Dental Association says removal is generally advised when wisdom teeth only partly break through the gums．Removal is also advised if there is a chance that wisdom teeth are poorly lined．The best time to remove is before the teeth cause any problems or pain．Young adults are the best candidates for wisdom teeth removal．
But why do we have wisdom teeth if we often need to get them removed? One theory has to do with our diets．Scientists say the diet of ancient humans probably required more chewing teeth．Life was probably a little rougher on the teeth back then, too．So it was good to have extras．
(1)
According to the passage, which of the following statements is NOT true?
[ ]
A．
Just older and wiser people can have wisdom teeth
B．
Wisdom teeth can cause problems if not in their right place
C．
Impacted wisdom teeth can't grow out of the gum fully
D．
Wisdom teeth that only partly break can get bacterial infections
(2)
Wisdom teeth should be removed ________．
[ ]
A．
when they break through the gums
B．
when they are below the gums
C．
if they are not well lined or get impacted
D．
if they take up enough room in the mouth
(3)
We can learn from the passage that ________．
[ ]
A．
impacted wisdom teeth have the risk of getting infected
B．
ancient humans need chewing teeth because of their happy life
C．
older adults are the best candidates for wisdom teeth removal
D．
more chewing teeth are needed for the diet of modern humans
The World Expo 2010 Shanghai China is to be staged in Shanghai from May1 to October 31, 2010．If you plan to visit the Shanghai Expo this summer，theChina Pavilion is a must－see area for you．
The China Pavilion，which is called Oriental Crown(东方之冠)，is locatedat the center of the Expo site．Standing 63 meters tall，the China Pavilion takesthe shape of an emperor’s crown，with the upper layers larger than the lower ones．Coveting 160,000 square meters in floor space, the pavilion consists of a national hall and a regional hall．Construction on the China Pavilion began on Dec．18,2007．The design of the China Pavilion was picked from a total of 344 de-signs put forward by Chinese from around the world．The pavilion possesses both traditional and modern fea-tures，which helps develop the theme of the 2010 Expo “Better City，Better Life”．For example，it is red in appearance, which contains the elements of traditional Chinese culture, and it is green indoors, with the use of energy-saving techniques．The Shanghai World Expo is expected to attract 70 million visitors from across the globe．It is estimated that 400,000 people will visit the Expo and its 140 pavilions every day during the period．but the China Pavilion is only able to receive about one tenth of the total．How to accommodate so many people in the pavilion remains a tough task．Luckily, the China Pavilion is built as a permanent land-mark．
During the Expo．the main structure will be used tor an exhibition based on the theme of “Chinese wis-dom in urban development “by explaining the values of harmony，nature and spirit．The three-story pavilion has three sections．The top floor’s “Footprint of the East” will show some of the changes in Chinese cities．There，you can see a film which shows how Chinese cities have changed，especially in the past 30 years．According to Lu Chuan，director of the film，the scenery is like something from The lord of the Rings．On the second floor，“Journey of Wisdom” will explain China’s four great inventions．And the ground’s “Blos-soming City “will display scenes from cities of the future．
(1)
Which of the following words can be used to describe the China Pavilion?
[ ]
A．
Tiny．
B．
Round．
C．
Exotic．
D．
Environment-friendly．
(2)
The China Pavilion can receive _________ visitors at most per day．
[ ]
A．
40,000
B．
400,000
C．
100,000
D．
20,000
(3)
We can infer that _________．
[ ]
A．
the China Pavilion will be pulled down after the World Expo 2010 is over
B．
the China Pavilion will probably continue to be open to visitors after the Expo is over
C．
you can continue to visit the Japanese Pavilion alter the Expo is over
D．
some foreign friends took part in the designs of the China Pavilion
(4)
On the second floor of the China Pavilion, you can ________．
[ ]
A．
enjoy a film about the changes of cities in China
B．
1earn what Shanghai looked like in the 1920 s
C．
find out how paper was invented
D．
see how Chinese cities will look like in the future
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Going on a road trip? The St．Louis Arch, Statue of Liberty and Golden Gate Bridge are great tourist sites．But if you prefer offbeat destinations(目的地), check out the following roadside attractions．
World's Largest Ball of Paint
Alexandria, Ind．
In 1977, Michael Carmichael set out to create the biggest ball of paint anywhere．Starting with a baseball as center, he painted layer after layer of paint day after day, year after year．The ball weighs more than 1,300 pounds, with more than 20,000 coats of paint,” which is recognized by Guinness World Records．Visitors can paint the ball themselves and become part of history．
The Museum of Dirt
Boston, Mass．
The museum is the idea of Glenn Johnson．Labeled(贴有标签的)glass bottles contain such treasures as dirt from the Great Wall of China, as well as sand from a desert in Saudi Arabia and Omaha Beach in France．Best of all, the cost of seeing this museum is dirt cheap：It's free．
Mount Horeb Mustard Museum
Mount Horeb, Wis．
It's heaven for hotdog lovers! This museum claims to have the world's largest collection of prepared mustard(芥末)．Its more than 4,100 bottles of spices come from 60 nations, including Turkey and China．Visitors learn the history of mustard, from how it's made to how it's advertised and sold．The museum's creator, Barry Levenson, loves mustard so much that he even puts it on ice cream!
Paper House
Rockport, Mass．
Swedish immigrant(移民)Ellis Stenman was much ahead of his time in 1922, when he started to build a two-room house almost entirely out of newspaper．At the time, people didn't give much –if any--thought to recycling paper．The house is framed with wood, but the walls are made of 215 layers(层)of newspaper．
(1)
The underlined word “offbeat” in the first paragraph has the same meaning as ________．
[ ]
A．
great
B．
foreign
C．
unusual
D．
historical
(2)
If you want to add your own work to what you visit, you may choose ________．
[ ]
A．
World's Largest Ball of Paint
B．
The Museum of Dirt
C．
Mount Horeb Mustard Museum
D．
Paper House
(3)
Which of the following is true of Barry Levenson according to the text?
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