B) how different the bacterial world is from the human world

C) how the water molecules work

D) what different bacteria one liquid contains from another

Questions 19-23 refer to the following invoice and letter.

Reading is thought to be a kind of conversation between the reader and the text. The reader puts questions,

as It were, to the text and gets answers. In the light of these he puts further questions, and so on.

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For most of the time this conversation goes on below the level of consciousness. At times, however,

we become aware of it. This is usually when we are running into difficulties, when mismatch is occurring

between expectations and meaning. When successful matching is being experienced, our questioning of the

text continues at the unconscious level.

Different people converse with the text differently. Some stay very close to the words on the page;

others take off imaginatively from the words, interpreting, criticising, analyzing and examining. The former

represents a kind of comprehension, which is written in the text. The latter represents higher levels of

comprehension. The balance between these is important, especially for advanced readers.

There is another conversation which from our point of view is equally important, and that is to do not

with what is read but with how it is read. We call this a process conversation as opposed to a content

conversation. It is concerned not with meaning but with the strategies (策略)we employ in reading. If we

are advanced readers our ability to hold a content conversation with a text is usually pretty well deveoped.

Not so our ability to hold a process conversation. It is precisely this kind of conversation that is of

importance when we are seeking to develop our reading to meet the new demands being placed upon us by studying

at a higher level.

19.Reading as a kind of conversation between the reader and the text becomes conscious only when .

A) the reader's expectations agree with what is said in the text

B) the reader has trouble understanding what the author says

C) the reader asks questions and gets answers

D) the reader understands a text very well

20.At a lower level of comprehension, readers tend to _________

A) read a text slowly

B) read without thinking hard

C) interpret a text in their own way

D) concentrate on the meaning of words only

21.A "process" conversation has to do with ________

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A) the application of reading strategies

B) matching our expectations with the meaning of a text

C) the development of our ability to check the details

D) determining the main idea of a text

22. According to the passage, it is of great importance for readers at a higher level to maintain

a balance between ________ .

A) conscious and unconscious levels of comprehension

B) the reader's expectations and the meaning of a text

C) lower and higher levels of comprehension

D) interpreting and criticizing a text

23.If we want to develop our reading ability at an advanced level, we should ________

A) learn to use different approaches in reading different texts

B) make our reading process more conscious

C) pay more attention to the content of a text

D) take a critical attitude towards the author's ideas

Questions 24-28 refer to the following invoice and letter.

Today, only 4 million people live and work on farms in the United States, but they produce more than

enough food for 200 million Americans. They are able to do this because modern agriculture depends more

on up-to-date machinery and scientific methods than it does on old-fashioned knowledge and human labor.

These days, one man or woman spending an afternoon in an air-conditioned, stereo-equipped tractor can do

the work that years ago would have required hundreds of hours of back-breaking drudgery.

As a result of the modernization of agriculture, the farm of today looks a lot like a factory. When

the farmer's hens lay their eggs, conveyor belts carry the eggs off to be sorted and packed. If the farmer

keeps pigs, those pigs will not be wallowing in the mud, but lying around in sanitary pens. And the farmer

is likely to be found studying a computer print-out of long-range weather conditions. Why isn' t the farmer

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milking cows in the barn? The answer is easy: A machine is doing it.

This reliance on modern technology has its problems for farmers. The tractors that plow their fields,

the combines that reap and thresh the grain, and the silos that store the grain for winter feeding are all

very expensive. For example, a single tractor can cost as much as $ 50,000. Without this equipment farmers

could not run their farms profitably, but, to pay for it, farmers must take out large bank loans. A single

bad season could put them deeply in debt. And, when the machinery wears out or becomes obsolete, the farmers

must replace it with newer, more expensive models. Still, most farmers are willing to put up with these

difficulties because their machines have freed them from the heavy labor and hard life that farmers had

to endure in the past.

24.In the United States there are fewer farmers, because .

A) modern agriculture provides enough food

B) many farmers have moved to cities

C) there are more well-equipped tractors

D) many farms are turned into factories

25.The first paragraph suggests that .

A) there is less and less farmland in the U.S.A

B) agriculture has greatly developed

C) farmers’ work is less heavier than in the past

D) tractors are great helpers for the farmers

26.It can be inferreded from the third paragraph that .

A) modern technology has brought about a lot of trouble

B) modern technology has cost farmers a lot of money

C) farmers were put deeply in debt

D) modern technology has released farmers from heavy labor

27.Which of the following statements is NOT true according to the passage?

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A) A modern farm and a factory are similar in some aspects.

B) Farm machines are expensive.

C) Farmers are unwilling to replace their worn-out machinery.