根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

How to improve your vocabulary

Vocabulary is a key part of learning a new language. _____1_____ Maybe you can’t learn a hundred new words a day, but you can learn one or two a day, totaling thousands of new words over the years. Here are some tips for building up your vocabulary.

Make a plan to learn new words. If you want to improve your vocabulary more quickly, you have to make at least a small promise. _____2_____

Make your vocabulary practical(实用的). _____3_____ For example, learn more of your trade language—the words that are commonly used in your business or hobby or vocation(职业). Find better, fresher, clearer words to express what your friends are talking about.

_____4_____ As you read, if you come across a new word that you don’t understand. Don’t miss it. Take the time to look it up in a dictionary. Write it down and use it later.

When you learn a word, use it immediately and frequently. Put your new word into conversation with as many different people as you can. _____5_____ Use it in sentences. Write it on a card and practice it while waiting for red lights.

A. Repeat it to yourself.

B. They’re highly reusable

C. Start learning where you are.

D. Decide to learn one new word every day or two.

E. When you’re writing something, use a dictionary frequently

F. Start by learning the words that can express what’s most important to you.

G. The more you read, the more words you’ll see, and the more you’ll understand.

How would you like to have been born without any ability to feel pain? There are such people. One of them is being studied by doctors at a hospital in New York City. He is a 22-year-old clerk who really does not know the meaning of pain. But he wishes he did.

Not long ago a packet of matches flared up(骤然烧起) in his hand. Luckily the burn was not serious. It caused large blisters(水泡) but still did not bother him. He said the burn felt like a fly crawling(在……上爬行) on his fingers. It has been the same story as far back as he can remember. He has never had headaches or sore(疼痛的) muscles. Bee stings, cuts and bruises(疼痛的) do not hurt.

Being free from pain is not as wonderful as you may think. The young man has had to have rotted teeth pulled because he never felt toothache warnings. A sudden attack of appendicitis(阑尾炎) could be deadly. Life without pain is as risky as trying to run a cruise ship without fire alarms.

1.In the final sentence, the writer uses “fire alarms” to mean ________.

A. loud noises that a person hears

B. a signal that something is wrong

C. heat warnings

D. the ability to smell smoke

2.The selection as a whole points to the fact that ________.

A. fire can cause serious injuries

B. life is happier without pain

C. teeth can be pulled painlessly

D. pain serves a useful purpose

3.The young man had to have teeth pulled because ________.

A. he did not know his teeth were decaying

B. he did not take care of his teeth properly

C. he did not like to visit the dentist

D. he was born with soft teeth

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