Can feeling of nostalgia(怀旧) be good for you? Or is it unhealthy to have a strong love for the past?
For years, medical experts have studied nostalgia and the reasons for it. Many experts warn that too much nostalgia is harmful. They say living in the past shows that a person is unhappy with his present life. These feelings keep the person from living his life to its fullest.
　　However, experts say it is normal to love the past sometimes. In fact, a little nostalgia can enrich a person’s life.
　　Dr. Louise Kaplan has written several books about nostalgia. She says these feelings often begin when a young person is between 13 and 19 years old.
　　“This is the time when you must face the loss of your childhood, “Kaplan says. “You see your new life is easily destroyed. But you think romantically about a golden past. You remember your childhood as a time when life is perfect.”
　　These feelings continue as the person gets older, Kaplan adds. She says many grown persons have a hard time keeping up with changes in the modem world, so they think back to their younger years. At that time the world seemed simple and more harmless.
　　Kaplan says these feelings do not always actually exist. The good old days did not always exist. The good old days weren’t always good. However, she says nostalgia can be helpful, if used properly.
　　“Feelings of nostalgia can cause you to remember a time when you had high hopes and dreams, “Kaplan says. “It might give you the strong wish to catch those dreams today in your past life.” She adds that nostalgia can prevent you from “cutting yourself off from your aim”.
【小题1】Feeling of nostalgia ______.

　  Animals can move from place to place, but plants cannot. When an animal is under attack, it can run away or fight back. Plants certainly cannot run away, and they lack teeth and claws. But plants can defend (保护) themselves by using both physical and chemical means.
　　Some plants have their own ways to keep animals away. For example, the leaves of the holly plant have sharp spines (刺) that discourage grass-eating animals. Holly leaves on lower branches have more spines than leaves on upper branches. This is because the lower leaves are easier for most animals to reach.
　　Some plants, such as the oak tree, have thick and hard leaves that are difficult for animals to eat. Some grasses may contain a sandy material; eating such grasses wears down the animal's teeth.
　　Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an unpleasant reaction. Some plants may fight against an attack by increasing the production of these chemicals. When a caterpillar (毛虫) bites a tobacco leaf, the leaf produces a chemical messenger. This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the caterpillar.
Many plants depend on both physical and chemical defenses. A certain plant in China, for instance, has prickly (多刺的) leaves, and each prickle contains poisonous venom (毒液) A single experience with this kind of plant will teach an animal to stay away from it in the future. 
【小题1】To defend themselves, oak trees use________.

Can feeling of nostalgia(怀旧) be good for you? Or is it unhealthy to have a strong love for the past?

For years, medical experts have studied nostalgia and the reasons for it. Many experts warn that too much nostalgia is harmful. They say living in the past shows that a person is unhappy with his present life. These feelings keep the person from living his life to its fullest.

　　However, experts say it is normal to love the past sometimes. In fact, a little nostalgia can enrich a person’s life.

　　Dr. Louise Kaplan has written several books about nostalgia. She says these feelings often begin when a young person is between 13 and 19 years old.

　　“This is the time when you must face the loss of your childhood, “Kaplan says. “You see your new life is easily destroyed. But you think romantically about a golden past. You remember your childhood as a time when life is perfect.”

　　These feelings continue as the person gets older, Kaplan adds. She says many grown persons have a hard time keeping up with changes in the modem world, so they think back to their younger years. At that time the world seemed simple and more harmless.

　　Kaplan says these feelings do not always actually exist. The good old days did not always exist. The good old days weren’t always good. However, she says nostalgia can be helpful, if used properly.

　　“Feelings of nostalgia can cause you to remember a time when you had high hopes and dreams, “Kaplan says. “It might give you the strong wish to catch those dreams today in your past life.” She adds that nostalgia can prevent you from “cutting yourself off from your aim”.

1.Feeling of nostalgia ______.

A．can cause you to think of your past which was full of hopes and dreams

B．might cause you to try to realize the golden dream in the present life

C．fill one with hopes for the future no matter what happens

D．bring about a love for the past and a hope for the future

2.The reason for grown persons to think back to their past is that ______.

A．time is hard, so they cannot keep up

B．they can hardly keep up with changes in today’s world with changes

C．many grown persons have little time keeping up with changes

D．they lived in the past, of which they are always proud

3.Which of the following is NOT talked about in the passage?

A．Too much nostalgia is harmful to our health.

B．Nostalgia shows that a person is not satisfied with his present life.

C．Only women have feelings of nostalgia.

D．A little nostalgia can make a person’s life more colorful.

4.Which of the following can be the best title for the passage?

A．Thoughts on Nostalgia

B．The Reasons for Nostalgia

C．Why Not Think Back to the Past

D．Nostalgia, Good or Bad

(2013·高考新课标全国卷Ⅰ)“You can’t judge a book by its cover，”________．

A．as the saying goes old　　B．goes as the old saying

C．as the old saying goes? D．goes as old the saying