[单项选择]We know less about the astronomical universe than we do about any social system because ______.
A. theories of its origin and history are varied
B. our knowledge of it is highly insecure
C. only a very small sample of it has been observed
D. few scientists are involved in the study of astronomy

[单项选择]We know less about the astronomical universe than we do about any social system because ______.
A. theories of its origin and history are varied
B. our knowledge of it is highly insecure
C. only a very. small sample of it has been observed
D. few scientists are involved in the study of astronomy

[单项选择]Surveys show that ______ less sleep than we think, ______ too much sleep could even harm our health.
A. not only do we need, but that
B. not only we need, but also
C. not only we need, but that
D. not only do we need, but also

[单项选择]Old John smoked less than before.

[单项选择]Some economists believe women earn less than men partly because ______.
A. there are more than enough women in the labor force
B. women have more freedom in selecting jobs
C. women are only provided with low-paid jobs
D. women are less experienced than men

[单项选择]

HAWAII What price paradise Less than you could possibly imagine on this incredible value holiday with Page & Moy, the UK’s No 1 tour operator to Hawaii. You can enjoy three weeks for the price of two at the Outrigger Village Hotel for just $ 899 during November or $ 939 in October. The Polynesians call Hawaii "paradise on earth". You’ll soon see why, whilst enjoying the facilities of the Outrigger Village Hotel including pool, bars, restaurant and shopping arcade, and just a five-minute walk from the legendary Waikiki beach. Life can be as busy or as relaxing as you like — we can even help you create your own itinerary of excursions to the other islands, each stunningly beautiful but very different. To start your holiday you can choose a 2-night stay in San Francisco, Los Angeles or Las Vegas absolutely free. Join us in the tropical paradise of Hawaii — 2 weeks from an unrepeatable price of $ 899 with a 3rd week free.
THE PRICE INCLUD
A. two-week holiday in October.
B. two-week holiday in November.
C. three-week holiday in November.
D. three-week holiday in October.

[单项选择]

Humanity uses a little less than half the water available worldwide. Yet occurrences of shortages and droughts (干旱) are causing famine and distress in some areas, and industrial and agricultural by-products are polluting water supplies. Since the world’s population is expected to double in the next 50 years, many experts think we are on the edge of a widespread water crisis.
But that doesn’t have to be the outcome. Water shortages do not have to trouble the world -- if we start valuing water more than we have in the past. Just as we began to appreciate petroleum more after the 1970s oil crises, today we must start looking at water from a fresh economic perspective. We can no longer afford to consider water a virtually free resource of which we can use as much as we like in any way we want.
Instead, for all uses except the domestic demand of the poor, governments should price water to reflect its actual value. This means charging a fee for the water its
A. Only half of the world's water can be used.
B. The world population is increasing faster and faster.
C. Half of the world's water resources have been seriously polluted.
D. Humanity has not placed efficient value on water resources.

[单项选择]What they discovered was nothing less than a new source of energy.
A. 他们所发现的并非不是新的能源。
B. 他们所发现的正是新的能源。
C. 他们所发现的不亚于新的能源。
D. 比起新的能源，他们什么也没发现。

[单项选择]What does cost performance index (CPI) less than 1.0 indicate ？（）
A. Cost overrun of the estimate
B. Cost according to the estimate
C. Cost underrun of the estimate
D. Early progres

[单项选择]A distribution with a mean that is less than its median is most likely:（）
A. is negatively skewed.
B. is positively skewed.
C. has negative excess kurtosis.

[单项选择]The expression "no less than" in the third paragraph can be replaced by______.
A. fewer than
B. as few as
C. as many as
D. not more than

[单项选择]In less than a millionth of a second the vast computer of an international airline can ______ accept 800 booking inquiries, and search its 50 million memory units for appropriate replies.
A. simultaneously
B. implicitly
C. cautiously
D. confidentially

[单项选择]An animal weighing less than 2.5 grams would starve because it would not be able to ______.
A. get enough oxygen
B. maintain its body temperature
C. bum its food fast enough
D. eat fast enough to supply fuel

[单项选择]Australia, with less than a tenth of America's population, last year earned $ 2 billion on foreign education.
A. 澳大利亚以少于美国十分之一的人力，去年在国外办教育赚了20亿美元。
B. 澳大利亚，少于美国人口的十分之一，去年在国外教育上赚了20亿美元。
C. 澳大利亚的人口尽管不到美国的十分之一，去年的留学生教育赚了20亿美元。
D. 澳大利亚，一个比美国人口少十分之一的国家，去年在对留学生的教育上赚了20亿美元。

[单项选择]No less than（）nobles of royal blood were killed in the Wars of the Roses.
A. 80
B. 90
C. 100
D. 110