Do you often listen to MP3 players at a too high voice? Are you frightened to hear this?
The sizes of MP3 players are very small, but small MP3 players make it easy to take hundreds of songs with you. So many young people carry them and listen to music every day. MP3 players are very popular among students. 
The scientists say teenagers should be far from high volume (音量), including mobile phones’ noise. A study says, “High volume and long listening time can cause hearing problems.” They think if young people listen at more than 89 decibels (分贝) every day, they will lose their hearing in five years. A scientist said, “So many young people often use personal music players and mobile phones at a high voice. I am afraid that they may be losing their hearing.
So let’s turn our MP3 players down!

1. 1.

   According to the passage, which of the following is true?

   1. A.
      Scientists tell young people to turn off their MP3 players.
   2. B.
      Teenagers will lose their hearing if they listen to hundreds of songs in MP3 players.
   3. C.
      A person will lose hearing in 5 years if he or she listens to an MP3 player every day.
   4. D.
      The mobile phone can also cause hearing problems if we don’t use it correctly.
2. 2.

   The underlined word “they” (Paragraph 4) most probably refers to ______.

   1. A.
      scientists
   2. B.
      MP3 players
   3. C.
      mobile phones
   4. D.
      teenagers
3. 3.

   Which might be the best title for this passage?

   1. A.
      Turn your MP3 players down!
   2. B.
      Never use MP3!
   3. C.
      How to protect your hearing.
   4. D.
      Young people’s hearing.

When we have small cuts in the skin(皮肤), something strange may happen. The cuts are able to heal(痊愈) themselves in a couple of days. How does this happen? Read on, and you will find out the secret.
Every living thing on the earth is made up of cells(细胞). Cells grow and make new cells. Most cells are very small and we can't see them with our eyes. Different cells have different uses. Our skin cells are special ones. The cells on the outside of our skin are old dead cells. New skin cells are right under the outside. These are the living skin cells. They work for our bodies. They help protect our bodies and heal cuts.
Our bodies make skin cells all the time. As the old cells fall off, new cells grow in the same place. Each person makes about 18 kg of skin cells during his or her life. Outside skin cells fit together closely with no gaps between them. When you cut yourself, you can harm your skin cells. A small cut will not be harmful. Your skin will quickly heal itself by making new skin cells. How do skin cells work? First, the cells near the cut get bigger and move into the gap. Next, these bigger cells meet in the middle. They form a new layer(层) of skin cells. Finally, new cells will grow until the gap disappears. In this way, your skin can grow and get well itself. How amazing the small cells are! Next time you have a cut, don't worry about it. Maybe in a few days, you will be surprised to find it healed.
【小题1】The underlined word “gaps” in the passage means “______” in Chinese.

When we have small cuts in the skin(皮肤), something strange may happen. The cuts are able to heal(痊愈) themselves in a couple of days. How does this happen? Read on, and you will find out the secret.

Every living thing on the earth is made up of cells(细胞). Cells grow and make new cells. Most cells are very small and we can't see them with our eyes. Different cells have different uses. Our skin cells are special ones. The cells on the outside of our skin are old dead cells. New skin cells are right under the outside. These are the living skin cells. They work for our bodies. They help protect our bodies and heal cuts.

Our bodies make skin cells all the time. As the old cells fall off, new cells grow in the same place. Each person makes about 18 kg of skin cells during his or her life. Outside skin cells fit together closely with no gaps between them. When you cut yourself, you can harm your skin cells. A small cut will not be harmful. Your skin will quickly heal itself by making new skin cells. How do skin cells work? First, the cells near the cut get bigger and move into the gap. Next, these bigger cells meet in the middle. They form a new layer(层) of skin cells. Finally, new cells will grow until the gap disappears. In this way, your skin can grow and get well itself. How amazing the small cells are! Next time you have a cut, don't worry about it. Maybe in a few days, you will be surprised to find it healed.

1.The underlined word “gaps” in the passage means “______” in Chinese.

A．突起             B．条纹             C．缝隙             D．代沟

2.From the passage, we know that cells______.

A．are large and we can see them with our eyes

B．can heal few cuts themselves

C．are in everything on the earth

D．can grow and make new cells

3.Skin cells heal cuts in three steps. ______is the right order.

4.Which of the following is TRUE according to the passage?

A．Each person can make 18 kg of skin cells every day.

B．Different cells have different uses in our bodies.

C．The skin cells have little work to do in the body.

D．Every living thing on the earth is made up of skin cells

5.The best title for this passage should be______.

A．How Skin Cells Heal Cuts

B．The Importance of Skin

C．How to Protect Our Fingers

D．The Importance of Cells