[单项选择]One problem that has not yet been solved, it seems, is that ______.
A. a prototype has not yet been accepted
B. financial backing is not available
C. the machine will need fire-resistant sensors
D. the machine would not work if the ventilation was overwhelmed

[单项选择]He has not quite solved the problem yet, but he is（）it.
A. making of
B. working on
C. clearing up
D. trying out

[单项选择]Complicated as seems the problem, it can be solved in only ten minutes with an electronic computer.
A. 尽管这个问题看起来很复杂，但它只能用计算机在十分钟之内解决。
B. 虽然问题似乎很复杂，但用计算机十分钟就能解决。
C. 因为这个问题很复杂，用计算机解决它需十分钟。
D. 用计算机解决复杂的问题只需十分钟。

[单项选择]Although the Reebok Company has solved the problem of fulfilling its orders, it______.
A. does not want to further expand its retailing network
B. still limits the number of shoes supplied to stores
C. is still particular about who sells its products
D. still carefully chooses the distributors of its products

[单项选择]Norwich has always been one of the smallest English cities.

[单项选择]Which one has not been developed at Cyberia according to the text.'
A. The Cyberia magazine.
B. An online dating agency.
C. Cyberia Records.
D. Cyberia Supermarket.

[单项选择]

Passage Three The winter in Iceland has been one 0f the worst ever. An animal that was born in Iceland and just returned there has enjoyed the weather. Keiko is a killer whale who is now living in a hidden bay. When Keiko was one or two years old, he was captured. This was in 1979. In 1982 he was moved to an amusement part in Ontario, Canada. Three years later another park took him to Mexico City. There, the 6.4-meter (21-foot) whale lived in a small pen with water that was too warm. In 1993 the "Free Willy" movie made people aware of his state. In 1996 the Free Willy Keiko Foundation moved him to a pool in an aquarium in Newport,Oregon. The foundation has spent over $12 million to return Keiko to Iceland, his home. Late last year the 40,000 -pound ( 18,0 -kilogram) whale was flown on a C-17 transport plane to pen near the Wesman Islands. Critics thought Keiko would suffer in the cold water. Instead, he is enjoying the cold and becomes more active. He likes to ju
A. 30,000 pounds
B. 18,000,000 grams
C. 60,000 ounces
D. 180,000 kilograms

[单项选择]One difficulty has been solved. But another one will ______.
A. arise
B. arouse
C. rise
D. arose

[单项选择]He has solved the problem ______ the tractor was out of order.
A. why
B. for which
C. which
D. that

[单项选择]To ______ the world peace has been one of the most crucial functions of the United Nations since it was founded in 1945.
A. sustain
B. maintain
C. contain
D. retain

[单项选择]It seems that one good measure to prevent future shock is for people to ______.
A. cherish more hope for the future
B. replace conventional ideas with modern ones
C. try to understand what is happening and prepare for the changes
D. take a closer look at how people in other cultures behave

[单项选择]No one has ______ been able to know who she is.
A. still
B. yet
C. already
D. just

[单项选择]Our company has been made one of the largest manufacturers in the field of chemical industry.
A. become, in
B. made, in field of
C. became, in the field
D. been made of, in