Dye (染料) call bring a little colour to life. Most clothing is coloured with dyes. Modern,manufactured dyes can be costly. Natural dyes from plant and animal products have been used since ancient times. Here we describe a natural way to dye wool.

       There are several methods to put dye onto material. The vat(缸)method,for example,can be used to dye wool with onionskins. For this example,use one hundred grams of natural woo1. The wool must be clean. Leave it overnight in water and liquid soap. Then wash it with clean water that is a little warm. Gently squeeze out the extra water.   

      A solution called a mordant (媒染) is used in the dying process. A mordant helps fix the dye to the material. Traditionally, mordants were found in nature. Wood ash is one example. But chemical mordants such as alum(矾)are popular today. Alum is sold in many stores. It is often mixed with cream of tartar, a fine powder commonly used in cooking.

      Mix eight grams of alum with seven grams of cream of tartar in a small amount of hot water. Add the solution to a metal pan of cool water. Next, add the wool and place the mixture over heat. Slowly bring the liquid to eighty-two degrees Celsius. Heat the mixture for forty five minutes. After it cools, remove the wool and wash it.

      To prepare the dye solution, cover thirty grams of onionskins with water. Use only the dry,brown outer skins. Boil the liquid until the onionskins lose their colour, about forty—five minutes. Remove the skins after the dye cools.

    Now it is time to dye the wool. Place the wool into the dye and heat the mixture. Bring it to a boil,then immediately reduce the heat to eighty-two degrees. Now heat the dye for about forty-five minutes or until the wool is the desired colour. Keep in mind that wet wool looks darker than it is.

      Once the dye cools, remove the wool and wash it. Now the wool is orange or yellow. Or at least it should be.

1. According to the passage, mordants are ___________.

      A. dyes used in the dying process  B. materials which will be put dye to

      C. wood ashes used in the dying process      D. not dyes but play an important role in the dying process

2. Which of the following statements about “natural dyes” is TRUE?

      A. They might be cheaper than chemical dyes.         B. They are more expensive than chemical dyes.

      C. They have been used for only recent years.          D. They are all made from animal products.

3. As for the vat method,which of the following things is NOT necessarily needed?

      A. Ash.       B. Water.           C. Mordant.   D. Temperature.

4. Choose the proper order of dying wool:

  a. boil the liquid with onionskins

  b. add mordants to a metal pan of cool water ,put the wool into it and heat the mixture

  c. wash the wool with clean water after it is left overnight in water and liquid soap

  d. put the wool into the dye and heat it

      A. c, b, a, d          B. d, c, d, a    C. b, a, d, c         D. a, b, c, d

第二部分: 阅读理解 (第一节 20小题; 第二节 5小题; 每小题2分,满分50分)

第一节,阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

   My grandfather was a teacher. He was the headmaster of a school for boys between thirteen and eighteen. I know that he was a kind and gentle man at heart, because when I was young, he gave me presents, and seated me on his knee, and told me stories. But I believe the boys at his school were afraid of him.

At school, when he walked into a room full of noisy boys, there was silence at once. When he looked at a boy with a certain look in his eyes, the boy went red in the face, and looked down at his shoes. If a boy brought him poor, careless work that was not the best the boy could do, my grandfather would pick up the boy’s book and throw it across the room, shouting, “Do it all again, and bring it back to me in the morning!” If the boy was late, or if he forgot to bring the work, he had to do it again, and again, and yet again. My grandfather never forgot.

He was a very different man at school from the man I saw day by day in his own home.

1. I knew my grandfather was kind and gentle, because _________

A.he was a teacher. 

B.he let me sit on his knee and told me stories.

C.he told me stories about how kind he was

D.he was the headmaster of a school

2. When he looked at a boy in a certain way, the boy ________

A.went red and could not return my grandfather’s look

B.looked back at my grandfather’s red face

C. looked at his shoes to see if they were dirty.

D. went red in the face because his shoes were dirty.

3.When he received poor work, my grandfather _______.

A.would become very angry.    

B.threw the work on the floor, and shouted across the room

C.threw the book at the boy.  

D.went red in the face

4.He was a different man at home because  ________.

A.he didn’t get angry at home as he did at school. 

B.he was not as gentle at home

C.he didn’t throw books about at school like he did at home

D.he did not get angry at home.

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