The tower of Big Ben, London’s most famous building, has always leaned (倾斜)slightly, but construction work on a new line for the London Underground seemed likely to give the tower a real lean. Engineers have had to prop up (支撑)its base to prevent it from damaging the rest of the Houses of Parliament.

To control the tower’s movement, engineers pumped grout(水泥浆)into the soil under the tower. The tower now leans an extra few centimeters, but the lean can only be seen by the most sharp-eyed observer.

Between 1995 and 1997, to lengthen the Jubilee line of the Underground, builders dug a 40-metre-deep hole just 31 metres north of the clock tower. And the new tube (underground )tunnels were even nearer to the tower. John Burland, who recently helped stop the increasing lean in the Leaning Tower of Pisa and was an adviser to the Jubilee line project, believed the work would affect the tower. In his opinion, no further lean should go beyond a safety limit of 27. 5 millimetres over the existing lean of 220 millimetres.

To keep the lean within this limit, Burland told the British Association about the new method of pumping grout immediately under the base of the tower. More than 300 tons of grout were pumped in during construction. The tower’s additional lean went between 10 and 25 millimetres, but never passed 27. 5 millimetres.

After the construction work was completed in late 1997, a review of mouvements in nearby walls showed that the building was in better shape than had been thought before and the safety limit was raised to 35 millimetres before any action needs to be taken.

Since 1997, the tower has continued to lean, Burland told Modern Construction. The latest measurements, taken this year, suggest that the tower’s lean had just reached 35 millimetres. But following regular re-examinations of the tower, experts are sure that the tower has stabilized (稳定). A spokesman for London Underground says: “We understand the tower has stabilized and returned to its normal movement cycle.”

From Modern Construction, 16 September 2000

    Which of the following drawings correctly shows how the propping up construction was carried

out?

1. What does the world “review” (in Paragraph 5) mean?

A. Observation.

B. Description.

C. Discussion.

D.Re-examination.

2. Why was the propping up construction necessary?

A. To stop the tower of Big Ben from necessary?

B. To stop sharp-eyed people from. seeing the lean.

C. To stop the Tower of Pisa from leaning to much

D.To stop the clock tower from leaning beyond its safety limit.

3. What was the existing lean of the tower at the time when the article was written?

A. 220 millimetres.

B. 255 millimetres.

C. 35 millimetres.

D. 27. 5 millimetres.

4. We can infer from the article that__________.

A. the tower of Big Ben will damage the Houses of Parliament

B. the Jubilee line should be stopped in Burland’s opinion

C. the writer is blaming Burland for making a mistake

D.the propping up work has proved to be successful

Holidaymakers who are bored with baking beaches and overheated hotel rooms head for a big

igloo. Swedish businessman Nile Bergqvist is delighted with his new hotel, the world's first igloo hotel. Built in a small town in Lapland, it has been attracting lots of visitors, but soon the fun will be over.

In two weeks'time Bergqvist's ice creation(作品)will be nothing more than a pool of water.

"We don't see it as a big problem," he says. "We just look forward to replacing it."

Bergqvist built his first igloo in 1991 for an art exhibition. It was so successful that he

designed the present one, which measures roughly 200 square meters. Six workmen spent more than eight weeks piling 1,000 tons of snow onto a wooden base; when the snow froze, the base was removed. "The only wooden thing we have left in the igloo is the front door," he says.

After their stay, all visitors receive a survival certificate recording their success. With no

windows, nowhere to hang clothes and temperatures below 0℃, it may seem more like a survival test than a relaxing( 轻松的) hotel break. "It's great fun," Bergqvist explains, "as well as a good start in survival training."

The popularity of the igloo is beyond doubt: it is now attracting tourists from all over the

world. At least 800 people have stayed at the igloo this season even though there are only 10 rooms. "You can get a lot of people in," explains Bergqvist. "The beds are three meters wide by two meters long, and can fit at least four at one time."

1. Bergqvist designed and built the world's first igloo hotel because ______

A. he believed people would enjoy trying something new

B. he wanted to make a name for the small town

C. an art exhibition was about to open

D. more hotel rooms were needed

2. When the writer says "the fun will be over," he refers to the fact that ______

A. hotel guests will be frightened at the thought of the hard test

B. Bergqvist's hotel will soon become a pool of water

C. holidaymakers will soon get tired of the big igloo

D. a bigger igloo will replace the present one

3. According to the text, the first thing to do in building an igloo is ______

A. to gather a pool of water                               B. to prepare a wooden base

C. to cover the ground with ice                         D. to pile a large amount of snow

4. When guests leave the igloo hotel they will receive a paper stating that _____

A. they have visited Lapland               B. they have had an ice-snow holiday

C. they have had great fun sleeping on ice    D. they have had a taste of adventure

5. Which of the four pictures below is the closest to the igloo hotel as described in the text?

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