73. Finally, he found the key __________________(解释区别)between species.(explain)

72. _______________________(分离了)from other continents for millions of years, Australia has many plants and animals that can’t be found anywhere else in the world.(separate)

71. After circling around the earth for three days, Shenzhou Spaceship received the command from the ground that_________________(着陆)as scheduled the next day.(land)

68. 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

67. 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

66. 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

65. David Tebbutt started Computer town UK with the purpose of＿＿＿＿＿

A. making better use of computer experts

B. improving computer programs

C. increasing computer sales

D. popularizing computers

(E)

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. "

64. The underlined word "it" in the second paragraph refers to the idea that Computer towns＿＿＿＿＿.

A. help to set up more computer clubs

B. bring people to learn to use computers

C. bring more experts to work together

D. help to sell computers to the public

63. We can infer from the text that "computer-literate" means＿＿＿＿＿

A. being able to afford a computer

B. being able to write computer programs

C. working with the computer and finding out its value

D. understanding the computer and knowing how to use it