In the famous fairy tale, Snow White eats the Queen's apple and falls victim to a curse（詛咒）;in Shakespeare's novel, Romeo drinks the poison and dies; some ancient Chinese emperors took pellets（藥丸）that contained mercury（水銀）, believing that it would make them immortal, but they died afterward.

Poison has long been an important ingredient in literature and history, and it seems to always be associated with evil, danger and death. But how much do you really know about poison?

An exhibition, The Power of Poison, opened last month at the American Museum of Natural History in New York, intended to give the audience a more vivid understanding of poison.

The museum tour starts in a rainforest setting, where you can see live examples of some of the most poisonous animals: caterpillars（毛毛蟲(chóng)）, frogs and spiders. Golden poison frogs, for instance, aren't much bigger than a coin, but their skin is covered with a poison that can cut off the signaling power of your nerves, and a single frog has enough venom to kill 10 grown humans.

"Poisons can be bad for some things," Michael Novacek, senior vice president of the museum, told NBC News. "Yet they can also be good for others."

A poisonous chemical found in the yew tree is effective against cancer, which is what led to the invention of a cancer-fighting drug called Taxol.

The benefits from natural poisons are not limited to just medicine. Believe it or not, many substances（物質(zhì)）that we regularly ingest（攝入）-chili, coffee and chocolate-owe their special flavors or stimulating（提神的）effects to chemicals that plants make to poison insects.

1.What does the underlined word "immortal" in Paragraph 1 mean?

A. happy B. not moral

C. living forever D. sick

2.What is the main purpose of the exhibition The Power of Poison?

A. To give people more in-depth knowledge about poison.

B. To teach people how to handle poisonous animals.

C. To inform people about which animals are the most poisonous.

D. To show how poison has been used for medical treatment.

3.Which of the following statements about the Golden poison frog is TRUE according to the article?

A. Its skin can cut off the signaling power of your nerves.

B. It's about the size of a coin.

C. It's the most poisonous animal on display.

D. You can only see it in a rainforest setting of the museum.

4.The stimulating effects of coffee come from ________.

A. natural poison made by the plant

B. the substances that we regularly ingest

C. chemicals produced by poisonous insects

D. its special flavor

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Six years ago at the age of 35,I suddenly decided I wanted to learn the cello（大提琴）.Straight away I rented an instrument and appeared before Wendell Margrave,professor of musical instruction.

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A. the author already knew some cello basics

B. the author went to a cello lesson every Tuesday

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A. he felt very bored with his new life

B. it was beautiful to be able to hear the music in his mind

C. Professor Margrave made learning the cello very easy for him

D. he enjoyed the feelings of growth and getting closer to his dream

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A. put on shows with his daughter

B. was determined to catch up with Rostropovich

C. is happy to have kept up his personal development

D. was confident that his peers would envy him for his cello playing ability

4.The purpose of the article is mainly to .

A. show his deep gratitude to his cello tutor

B. advise readers on how to improve their cello skills

C. describe his incredible efforts to overcome difficulties

D. encourage readers that it's never too late to pursue their dreams

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