When you look at your food, some ingredients are easy to see. For example, there is cheese on your pizza and butter on your bread. But our meals are also filled with ingredients you can’t see. And you might be surprised to learn just how much those hidden (隐藏的) ingredients affect your health.

Salt is a perfect example of an ingredient that you might not notice, even when you eat a lot of it. More than 75% of the salt we eat is hidden in restaurant meals, fast food and processed (加工过的) food , such as French fries, hot dogs and even biscuits.

Salt is important to us. It keeps our muscles (肌肉）working and our nerves (神经）sending  messages through the whole body. Salt can be used to clean teeth, to make our skin smooth or added to a relaxing bath. Salt is also used to help make food last (持续) longer.

However eating too much salt can cause heart problems. For a long time, heart trouble has been regarded as an adult problem, but new research shows that salt is starting to affect kids. Then how much salt is safe for kids every day? Let's look at the following chart:

Kids should not eat more than that.

1.The underlined word “ingredients” means “__________” in Chinese.

2.The first two paragraphs tell us _________.

3.Which of the following is Not the use of salt according to the passage?

4. If Tim is 10 years old, how much salt should he eat every day?

5. What can we learn from the passage?

Once there were two crows (乌鸦)whose opinions(观点) were always opposite.
One day, one of the crows said to the other, “ You should realize, of course, that I can fly much higher than you.”
“ Don’t be ridiculous (荒谬的).” the other crow said. “ Everyone knows that I can fly much higher than you.”
“No, you can’t” the first crow said.
“Yes, I can” the second crow replied, and the argument went on and on.
At last they decided to have a contest to solve the argument.
“ We will compete to find out who can fly higher while carrying a bag” the first crow said.
They argued for some time because of the size of the bag, but at last came to an agreement.
Then there was a further argument about what each bag would be filled with. Finally, they agreed that the first crow would fill his bag with cotton and the second crow would fill his with salt.
The first crow thought he was clever to agree to this, because salt is much heavier than cotton. At last they were ready for the contest. Holding their bag in their mouths, they flew into the sky.
They had not been flying for long. However, when it began to rain- as the second crow had expected it would. Can you guess who could fly higher?
【小题1】The two crows were arguing about ____

Right in the middle of the town are some long ponds(水池). They are only about half a foot deep. The men of Symi dug out the earth to make the ponds.
Over each pond is a low cover. It is made of glass that you can see through.
At night, sea water is taken into the ponds. The next day, the hot sun shines through the covers. The sun light turns the water into vapor(水蒸气) and the vapor goes up from the ponds. The salt is left behind.
As it goes, the vapor became mist. On the inside of each cover, the little drops of mist run together to make big drops. These drops run down the sides of the cover, filling other ponds with fresh water.
The salt left in the ponds is washed out each night. Then more sea water is taken in. The factory is ready for the next day’s work. The covers and other parts of the factory cost very little. Sea water and sun cost nothing. Most people of Symi are poor. So to them this new way of getting fresh water seems wonderful.
【小题1】 Where are the little drops made into big drops?

Right in the middle of the town are some long ponds(水池). They are only about half a foot deep. The men of Symi dug out the earth to make the ponds.

Over each pond is a low cover. It is made of glass that you can see through.

At night, sea water is taken into the ponds. The next day, the hot sun shines through the covers. The sun light turns the water into vapor(水蒸气) and the vapor goes up from the ponds. The salt is left behind.

As it goes, the vapor became mist. On the inside of each cover, the little drops of mist run together to make big drops. These drops run down the sides of the cover, filling other ponds with fresh water.

The salt left in the ponds is washed out each night. Then more sea water is taken in. The factory is ready for the next day's work. The covers and other parts of the factory cost very little. Sea water and sun cost nothing. Most people of Symi are poor. So to them this new way of getting fresh water seems wonderful.

1. Where are the little drops made into big drops?

    A. On the inside of the covers.      

    B. In the ponds with fresh water.

    C. On the walls of the salt water ponds.                

    D.Between the fresh water and the salt water.

2.The men of Symi dug some long ponds        .

    A. in order to keep sea water        

    B. in order to get hot water inside

    C. in order to fill them with fresh  

    D. in order to get fresh water

3.Which picture shows the right way to get fresh water in Symi?

Once there were two crows (乌鸦)whose opinions(观点) were always opposite.

One day, one of the crows said to the other, “ You should realize, of course, that I can fly much higher than you.”

“ Don’t be ridiculous (荒谬的).” the other crow said. “ Everyone knows that I can fly much higher than you.”

“No, you can’t” the first crow said.

“Yes, I can” the second crow replied, and the argument went on and on.

At last they decided to have a contest to solve the argument.

“ We will compete to find out who can fly higher while carrying a bag” the first crow said.

They argued for some time because of the size of the bag, but at last came to an agreement.

Then there was a further argument about what each bag would be filled with. Finally, they agreed that the first crow would fill his bag with cotton and the second crow would fill his with salt.

The first crow thought he was clever to agree to this, because salt is much heavier than cotton. At last they were ready for the contest. Holding their bag in their mouths, they flew into the sky.

They had not been flying for long. However, when it began to rain- as the second crow had expected it would. Can you guess who could fly higher?

1.The two crows were arguing about ____

A．who was much clever

B．who can fly higher

C．how to fly into the sky

D．how to carry the bag

2.The underlined phrase “came to an agreement” means ____ in Chinese.

A．达成一致         B．争论结束          C．请来裁判         D．争论升级

3.In the rain the bag with cotton in it would got ____.

A．lighter            B．heavier           C．bigger            D．smaller

4.The second crow filled his bag with salt because he thought ____

A．salt was lighter                         B．cotton was heavier

C．it would rain                           D．he would need some salt

5.How many times did the two crows argue?

A．Once             B．Twice             C．Three times        D．Four times