根据以下资料，回答1~4题。

Uncle Sam is a tall, thin man．He's an older man with white hair and a white beard．He often wears a tall hat, a bow tie, and the stars and stripes of the American flag.

Who is this strange-looking man? Would you believe that Uncle Sam is the US government? But why do you call the US government Uncle Sam?

During the War of 1812, the US government hired meat packers to provide meat to the army．One of these meat packers was a man named Samuel Wilson．Samuel was a friendly and fair man．Everyone liked him and called him Uncle Sam.

Sam Wilson stamped the boxes of meat for the army with a large US for United States．Some government inspectors came to look over Sam's company.

They asked a worker what the US on the boxes stood for．As a joke, the worker answered that these letter stood for the name of his boss, Uncle Sam.

The joke spread, and soldiers began saying that their food came from Uncle Sam．Before long, people called all things that came from the government "Uncle Sam"．"Uncle Sam" became a nickname for the US government.

Soon there were drawings and cartoons of Uncle Sam in newspapers．In these early pictures, Uncle Sam was a young man．He wore stars and stripes, but his hair was dark and he had no beard．The beard was added when Abraham Lincoln was President．President Lincoln had a beard.

The most famous picture of Uncle Sam is on a poster from World War I．The government needed men to fight in the war．In the poster, a very serious Uncle Sam points his finger and says "I want YOU for the US Army."

Uncle Sam often wears a tall hat, __, and the stars and stripes of the American flag.

以某公司的名义写一个竞赛通知。内容如下：

(1)竞赛的名称和内容。

(2)参与对象。

(3)竞赛的时间。

(4)报名的截止日期。

请在第____处填上正确答案。

The joke means taking medicine __.

根据以下资料，回答1~5题。

请在第____处填上正确答案。

根据以下资料，回答17~20题。

Many people catch a cold in the springtime and/or fall．It makes us wonder., if scientists can send a man to the moon, why can't they find a cure for the common cold．The answer is easy．There are literally hundreds of kinds of cold viruses out there．You never know which one you will get, so there isn't a cure for each one.

When a virus attacks your body, your body works hard to get rid of it．Blood rushes to your nose and brings congestion with it．You feel terrible because you can't breathe well, but your body is actually "eating" the virus．Your temperature rises and you get a fever, but the heat of your body is killing the virus．You also have a runny nose to stop the virus from getting to your cells．You may feel miserable, but actually your wonderful body is doing everything it can to kill the cold.

Different people have different remedies for colds．In the United States and some other countries, for example, people might eat chicken soup to feel better．Some people take hot baths and drink warm liquids．Other people take medicines to stop the fever, congestion, and runny nose．

There is one interesting thing to note--some scientists say taking medicines when you have a cold is actually bad for you．The virus stays in you longer because your body doesn't have a way to fight it and kill it．Bodies can do an amazing job on their own．There is a joke, however, on taking medicine when you have a cold．It goes like this:

If takes about one week to get over a cold if you don't take medicine, but only seven days to get over a cold if you take medicine.

The reason that scientists cannot cure a common cold is __.

Scientists say when we catch cold, __.

When we catch cold, how does our body work hard?

This summer trainers hope to __.

IfKeiko can't adjust to the wild, the foundation __.

根据以下资料，回答13~16题。

The winter in Iceland has been one of the worst ever．An animal that was born in Iceland and just returned there has enjoyed the weather．Keiko is a killer whale who is now living in a hidden bay.

When Keiko was one or two years old, he was captured．This was in 1979．In 1982 he was moved to an amusement part in Ontario, Canada．Three years later another park took him to Mexico City．There, the 6.4-meter (21-foot) whale lived in a small pen with water that was too warm．In1993 the "Free Willy" movie made people aware of his state．In 1996 the Free Willy Keiko Foundation moved him to a pool in an aquarium in Newport, Oregon.

The foundation has spent over $12 million to return Keiko to Iceland, his home．Late last year the 40,000-pound (18,100-kilogram) whale was flown on a C-17 transport plane to pen near the Wesman Islands.

Critics thought Keiko would suffer in the cold water．Instead, he is enjoying the cold and becomes more active．He likes to jump out of the water to get sprayed by the salt spray．Since his return, he acts more like a wild whale．He dives more often, eats more live fish, and is more active.    

Keiko still isn't ready to go out alone into the open sea．Trainers hope to put him in a larger bay．They also hope to train him to follow a boat．They don't know what Keiko will do when he meets other sea animals．So far the only animals who have come near Keiko's cage left when they saw him.    

They would like to let Keiko free this summer．No one knows if he will be ready．If he isn't, the Keiko Foundation is ready to take care of him．It will cost about $1 million a year.

Critics thought that Keiko would __.