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A food additive is any substance that is added to food. Many people are put off by the idea of“chemicals in food.”The truth is that all food is made up of chemicals. Natural substances like milk, as well as man-made ones like drinks on sale in the market, can be described by chemical formulas. Some chemical substances are indeed harmful, but a person who refused to consume any chemicals would find nothing to eat.

The things we eat can be divided into natural and man-made substances. Some people feel that only natural foods are healthy and that all man-made ingredients are to be avoided. But many natural chemicals, found in plants and animals, are harmful when eaten, and some laboratory-made substances increase the nutritional value of food. Other chemicals have natural and man-made forms that are exactly alike: vitamin C is vitamin C, whether it comes from a test tube or from an orange. Like“chemical”,“man-made”doesn’t necessarily mean“not fit to eat”.

Food additives are used for many reasons. We add sugar and salt and other things to foods we prepare at home to make them taste better. Food producers have developed a range of additives that stabilize, thicken, harden, keep wet, keep firm, or improve the appearance of their products. Additives can make food more convenient or nutritious, give it a longer shelf life, and make it more attractive to the consumer, thus increasing the sales and profits of the producers.

Food additives are presently the centre of a storm of serious argument. Food producers have been known to use additives that have not been proved safe; some substances in common use have been proved unsafe and have been taken off the market. Many people feel there’s a risk of eating food to which anything has been added. But food additives are now regulated by the FDA of the federal government, and new additives are subjected to strict testing before they can be placed on the market. For most people, the chances of developing serious side effects from the long-term use of presently approved food additives are very slim.

68. From the passage we can learn that .

A. all foods consist of chemical substances

B. it is right to reject chemicals in food

C. food additives are harmful to our health

D. natural foods are much safer than man-made ones

69. Which of the following is TRUE according to the passage?

A. Foods with more additives have higher nutritional value.

B. To ensure food safety, the FDA will ban food additives.

C. Foods free of additives can keep a much longer shelf life.

D. Food additives can improve the quality of foods in many ways.

70.We can infer from the regulation to the food additives by the FDA that .

A. new additives will be approved more easily than before

B. food producers won’t be allowed to use new food additives

C. food with common-used additives will be taken off the market

D. food additives will be used in a safer and more scientific way

71. According to the writer, the food additive is .

A. worrying B. acceptable C. poisonous D. avoidable

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Like fine food, good writing is something we approach with pleasure and enjoy from the first taste to the last. And good writers, like good cooks, do not suddenly appear full-blown. Quite the opposite, just as the cook has to undergo a particular training, mastering the skills of his trade, the writer must sit at his desk and devote long hours to achieving a style in his writing, whatever its purpose is—schoolwork, matters of business, or purely social communication.

You may be sure that the more painstaking the effort, the more effective the writing, and the more rewarding.

There are still some faraway places in the world where you might find a public scribe to do your business or social writing for you, for money. There are a few managers who are lucky enough to have the service of that rare kind of secretary who can take care of all sorts of letter writing with no more than a quick note to work from. But for most of us, if there is any writing to be done, we have to do it ourselves.

We have to write school papers, business papers or home papers. We are constantly called on to put words to papers. It would be difficult to count the number of such words, messages, letters, and reports put into mails or delivered by hand, but the daily figures must be extremely large. What is more, everyone who writes expects, or at least hopes whatever he writes will be read, from first word to last, not just thrown into some “letters-to-be-read” files or into a wastepaper basket. This is the reason we bend our efforts toward learning and practicing the skills of interesting, effective writing.

57. In this passage, good writing is compared to fine food because _______.

A. both are enjoyable B. both are hard to learn

C. both are necessary to life D. both take a long time to prepare

58. according to the passage, which of the following statements is true?

A. Writing skills are less important than experience.

B. A good writer should have his own way of writing.

C. A good writer should learn to write all kinds of articles.

D. The more efforts one makes, the more money one can earn.

59. The author thinks that the most important reason for us to practice writing skills is _______.

A. to earn our living B. to attract others to read

C. to do daily reports easily D. to become good secretaries

60. The purpose of the author in writing this passage is to _______.

A. comment and blame B. introduce and describe

C. explain and persuade D. interest and inform

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Like fine food, good writing is something we approach with pleasure and enjoy from the first taste to the last. And good writers, like good cooks, do not suddenly appear full-blown. Quite the opposite, just as the cook has to undergo a particular training, mastering the skills of his trade, the writer must sit at his desk and devote long hours to achieving a style in his writing, whatever its purpose is—schoolwork, matters of business, or purely social communication.

You may be sure that the more painstaking the effort, the more effective the writing, and the more rewarding.

There are still some faraway places in the world where you might find a public scribe to do your business or social writing for you, for money. There are a few managers who are lucky enough to have the service of that rare kind of secretary who can take care of all sorts of letter writing with no more than a quick note to work from. But for most of us, if there is any writing to be done, we have to do it ourselves.

We have to write school papers, business papers or home papers. We are constantly called on to put words to papers. It would be difficult to count the number of such words, messages, letters, and reports put into mails or delivered by hand, but the daily figures must be extremely large. What is more, everyone who writes expects, or at least hopes whatever he writes will be read,　 from first word to last, not just thrown into some “letters-to-be-read” files or into a wastepaper basket. This is the reason we bend our efforts toward learning and practicing the skills of interesting, effective writing.

1. In this passage, good writing is compared to fine food because _______.

A. both are enjoyable　　 B. both are hard to learn

C. both are necessary to life D. both take a long time to prepare

2. according to the passage, which of the following statements is true?

A. Writing skills are less important than experience.

B. A good writer should have his own way of writing.

C. A good writer should learn to write all kinds of articles.

D. The more efforts one makes, the more money one can earn.

3. The author thinks that the most important reason for us to practice writing skills is _______.

A. to earn our living 　　　 B. to attract others to read

C. to do daily reports easily D. to become good secretaries

4. The purpose of the author in writing this passage is to _______.