题目内容

Every one of us gets so used to punctuation marks that not many of us give them a second thought. Actually, the ancient Greeks wrote this way. The lack of punctuation marks probably didn’t bother good readers, though. As they read, they just put pauses where they fit best. Also at this time, sentences switched directions. A sentence read from

left to right. The next one read right to left, and then left to right again, etc. The ancient Romans sometimes punctuated like this: They put something that can separate words in a sentence. The word punctuation actually comes from this idea and the Latin word punctum,

which means a dot.

When the 5th century arrived, there were just two punctuation marks: spaces and points. The spaces separated words while the points showed pauses in reading. Then in the 13th century, a printer named Aldus Manutius tried to standardize punctuation. He always used a period for a complete stop at the end of a sentence. He used a slash (/) to indicate a short pause. Over time, that slash was shortened and curled, and it became the modern comma (逗号).

Since that time, other marks have enlarged the punctuation family. The exclamation mark (感叹号) comes from the Latin word io. It means “exclamation of joy.” The question mark originally started out as the Latin word questio, meaning question. Eventually, scholars put it at the end of a sentence to show a question.

Punctuation even keeps changing nowadays. New marks are coming into existence, and old punctuation marks are used in new ways. Take for example the “interrobang”. This 1962 invention combines the question mark and exclamation mark for times when writers want both. For example, “She did what?” or “How much did you pay for that dress?” Obviously, the interrobang is not widely used or recognized yet, but its invention shows that English is not yet finished with its punctuation.

1.From the first paragraph, we can know that _______.

A. good readers had trouble reading without punctuation marks

B. a sentence always read from left to right in ancient Greece

C. ancient Greeks switched the direction of punctuation marks

D. the use of punctuation marks can date back to ancient times

2.The passage is developed _______.

A. by time B. by space

C. by comparison D. by importance

3.We can learn from the passage that _______.

A. ancient Romans didn’t use any punctuation marks

B. exclamation and question marks came from Latin

C. spaces and slashes were already used before the 5th century

D. Aldus Manutius first started to use commas

4.What can be concluded from the last paragraph?

A. The combination of two marks will not work.

B. It takes time for people to accept new punctuation marks.

C. Old punctuation marks need to be standardized.

D. Punctuation marks are still changing today.

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Think about vitamin D when you’re catching up on summer rays. It’s sometimes called the “sunshine vitamin” because it’s produced in your skin in response to sunlight. Vitamin D is a fat-soluble (脂溶性的) vitamin in a family of compounds that includes vitamins D-1, D-2, and D-3. It can affect as many as 2,000 genes in the body.

Vitamin D has several important functions. Perhaps the most vital are regulating the absorption of calcium and phosphorous(磷), and promoting normal immune system function. Getting enough vitamin D is important for normal growth and development of bones and teeth, as well as improving resistance against certain diseases.

In addition to its primary benefits, research suggests that vitamin D may also play a role in:

reducing your risk of multiple sclerosis(多发性硬化), according to a 2006 study published in the Journal of the American Medical Association

decreasing your chance of developing heart disease, according to 2008 findings published in Circulation

helping to reduce your possibility of developing the flu, according to 2010 research published in the American Journal of Clinical Nutrition

regulating mood and warding off depression

losing weight or preventing heart disease

How do you get it? Your body produces vitamin D naturally when it is directly exposed to sunlight. A little can go a long way. All you need is 10 minutes a day of midday, pre-sunscreen sun exposure,especially if you have fair skin. Besides getting vitamin D through sunlight, you can also get it through certain foods and supplements to ensure adequate levels of the vitamin in your blood.

1.Why is Vitamin D sometimes called “Sunshine Vitamin”?

A. Because it is produced in your skin reacting to sunlight.

B. Because it is named a fat-soluble vitamin.

C. Because it is produced with enough sunshine.

D. Because it is like sunshine in summer.

2.How can a person ensure enough Vitamin D in his/ her body?

A. He/ She could ask doctors for help.

B. He/ She should walk a long way in the sunlight.

C. He/ She should be exposed to sunlight for a long time.

D. He/ She should get it through sunlight, foods and supplements.

3.Which of the following is NOT the function of Vitamin D?

A. Preventing heart disease.

B. Helping the body grow normally.

C. Producing calcium and phosphorous.

D. Decreasing anxiety and nervousness.

4.Which is the best title of the passage?

A. Vitamin D Family

B. Vitamin D, You Need It

C. Ways to get Vitamin D

D. A Good Medicine—Vitamin D

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