阅读下面的文本, 从A、B、C、D四个选项中选出最佳选项。

    My friend Bob has a large police dog named Jack. Every Sunday afternoon, Bob and Jack have a walk in the park near their home. Jack likes these walks very much.

    On a cold Sunday afternoon, I go to Bob's home. Bob is happy to see me. At first Jack is happy too. Bob and I talk for a long time. Jack plays with a ball in the room for some time. Then he sits down in front of me and looks at me. I go on talking with Bob. Just at that time, Jack takes my hat and runs out of the room. I go after him to get my hat back. Suddenly, I know what Jack wants to do.

What a clever dog!

    Barbara McClintock was one of the most important scientists of the twentieth century. She made important discoveries about genes（基因）and chromosomes（染色体）.

    Barbara McClintock was born in 1902 in Hartford, Connecticut. Her family moved to the Brooklyn area of New York City in 1908. Barbara was an active child with interests in sports and music. She also developed an interest in science.

    She studied science at Cornell University in Ithaca, New York. Barbara was among a small number of undergraduate students to receive training in genetics in 1921. Years later, she noted that few college students wanted to study genetics.

    Barbara McClintock decided to study botany, the scientific study of plants, at Cornell University. She completed her undergraduate studies in 1923. McClintock decided to continue her education at Cornell. She completed a master's degree in 1925. Two years later, she finished all her requirements for a doctorate degree.

    McClintock stayed at Cornell after she completed her education. She taught students botany. The 1930s was not a good time to be a young scientist in the United States. The country was in the middle of the great economic Depression. Millions of Americans were unemployed. Male scientists were offered jobs. But female geneticists were not much in demand.

    An old friend from Cornell, Marcus Rhoades, invited McClintock to spend the summer of 1941 working at the Cold Spring Harbor Laboratory. It is a research center on Long Island, near New York City. McClintock started a temporary（临时的）job with the genetics department. A short time later, she accepted a permanent（永久的）position in the laboratory. This gave her the freedom to continue her research without having to teach or repeatedly ask for financial aid.

    By the 1970s, her discoveries had had an effect on everything from genetic engineering to cancer research. McClintock won the Nobel Prize for Physiology or Medicine in 1983 for her discovery of the ability of genes to change positions on chromosomes. She was the first American woman to win an unshared Nobel Prize.

Allan is a doctor. He is taking notes about the lifestyles of two children, Angela and Andy.

Angela: The girl looks healthy. She knows how to keep fit. She gets up early even(即使) at week-ends. And enough exercise makes her fit. She doesn't eat fast food very often.

But sometimes she eats snacks between meals. Are most girls greedy(嘴馋的)? She should eat fewer snacks. They are not good for her. She can eat more fruit between meals.

Andy: Andy likes sports. He is good at swimming and football. He does sports for over one hour every day. That makes him fit and strong.

But Andy is a picky eater. He doesn't eat enough meat for meals. So he is not tall. And he has another problem—sleeping in(睡过头，迟起床). He gets up too late on Saturdays and Sundays.

To get enough energy, Andy should get up early and eat more meat.

Hello, I'm Linda. I'm 12. I have a good friend. 1 name is Cherry. She is 13. Look! This is Cherry's 2 . It's nice and tidy.

A purple bed is in the room. Cherry likes purple. 3 is that on the bed? It's her schoolbag. It's purple, too. A model plane and a pencil box are on the desk. In the pencil box you can see some  4 , pencils and rulers. What 5 is the desk? It's white. Where are her books? They are under the desk. Some CDs and tapes are 6 the desk, too. A chair is next to(紧挨着) the desk. Cherry's 7 is on the chair. It's an English dictionary. Where is Cherry's tablet(平板电脑)? It's in the box under the chair. It's made in China. You can see8 girls in the room. One is Cherry and the other(另一个) is her 9 , Lucy. Lucy is her aunt's daughter. She always comes to Cherry's room. A cat is in the room, too. I 10 her name. It's Mimi. Cherry likes her room.

Where has the Time gone?is the hottest song that has moved thousands of Chinese. Chinese parents give their children endless love and ask nothing in return. However, sometimes, daughters and sons are too busy growing up and forget that their parents are getting older and older. What should we do? Let's have a look at a l{#blank#}1{#/blank#} of a father's. 

Dear son，

One day if you see me old and I am not myself, have patience and try to understand me. If I get dirty when eating…, if I cannot dress…, have patience. Remember the hours I spent t{#blank#}2{#/blank#} it to you. 

If, when I speak to you, I say the same things one thousand and one times, do not stop me and l{#blank#}3{#/blank#} to me. When you were small, I had to read to you one thousand and one times the same story until you get to sleep. 

When I do not want to have a shower, neither shame（羞辱） me nor scold（责备） me. Remember when I had to chase you with a thousand excuses I invented, in order that you wanted to bath. 

When you see me meet something n{#blank#}4{#/blank#}, give me the necessary time and don't laugh at me. I taught you how to do so many things… to eat well, to dress well… to face life. 

If I do not want to eat, do not force me. I know well when I need to and when not. When my legs do not allow me to walk, give me your h{#blank#}5{#/blank#} the same way I did when you gave your first steps. 

When sometimes I lose the memory during our conversation, let me have the necessary time to remember. And if I cannot do it, do not become nervous b{#blank#}6{#/blank#} the most important thing is not my conversation but to be with you and to have you listen to me. 

Yours, 

Father

 Dad drives me to school nearly every day. However, he was busy {#blank#}1{#/blank#}(工作) this morning and could not drive me there. I had to t{#blank#}2{#/blank#} the bus. On the bus I saw an old man. He looked very weak. Today there were {#blank#}3{#/blank#}(更多) people on the bus than before, but no one gave him a seat. Is{#blank#}4{#/blank#} up and gave my seat to him. He thanked me and asked me about my n{#blank#}5{#/blank#} and my school. We talked {#blank#}6{#/blank#}(开心地). 

 Later, in the {#blank#}7{#/blank#}(第三) class, Mr. Xu came in and asked me to go to the front. I was a little {#blank#}8{#/blank#} (害怕的). Then he told the class what I did on the bus this morning. He knew it because he got a phone call f{#blank#}9{#/blank#} the old man. Mr. Xu said that I could be a good example(榜样) to my classmates. I was so glad! It was r{#blank#}10{#/blank#} a good day for me.