练习3
I dazzle! I sparkle!
I am a jewel. I am also veryhard.
People use me to cut glass.
Who am I? Diamond.
I am ground into powder.
People can shake me on babies tokeep them dry.
Who am I? Talc.
I hold heat well.
People use me to make frying pansand wood-burning stoves.
If I get wet, I rust. Who am I? Iron.
Strike me against a rock.
See the spark?
Campers can use me to start fires.
Who am I? Flint.
练习4
I burn slowly.
People can use me for heat andpower.
Who am I? Coal.
I look like wood. I used to bewood.
But I am not wood anymore.
Who am I? Petrified wood.
Rocks are on the ground.
Rocks are under the ground.
Rocks are made of minerals.
Rocks are everywhere on earth.
Thank you for coming to the RockHall of Fame!
Good-bye.
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