B

　　I love it at night. It’s peaceful. And when it cools down I sometimes do some ironing. I don’t really care for it. I work full-time and I am too busy for most housework. I remember the old woman who taught me to iron. I was about 15 and I had to get a job taking care of a woman to make a living. She had been an able-bodied, healthy woman until the accident that caused her to be paralyzed(瘫痪的).

　　The woman sat in an electric wheelchair all day. She could only move her head and arms. She would tell me how to do things. She would teach me in great details on the correct ways to do things. Her home was perfect and beautiful. She would follow me around in her electric wheelchair to make sure I did everything exactly right. I’m sure she had been a perfect homemaker. She would have me fold everything, including socks. I would complain silently and wish terrible things on her. She taught me the right way to make the bed. I know sometimes she’d get frustrated(沮丧) and impatient with me. I knew she wanted to do it herself. But she never shouted at or blamed me. She only insisted I do it right. I didn’t like it much, but I did it.

　　Today I can iron pretty well. I know where to start on a shirt and the right way to do the trousers. Now when I think about it, I don’t think she is an old lady. I think she might have been about my age now. Anyway, when I iron, I think of her and silently thank her for all the things I learned.

　　( ) 46.The writer used to take care of the lady because ________.

　　A. she wanted to learn to do housework B. she was a friend of the lady’s

　　C. she had to earn some money D. she couldn’t find a room to live in

　　( ) 47. What can we know about the old woman from the second paragraph?

　　A. She lost hope after the accident B. She was strict with everyone around her

　　C. She was a rude person D. She had a positive attitude towards life

　　( ) 48. The little girl was ______ when the lady taught her how to do housework.

　　A. encouraged to learn B. unwilling to learn

　　C. delighted to learn D. recommended to learn

　　( ) 49.Now the writer ______

　　A. is still afraid of the lady B. hates the strict lady

　　C. admires the disabled lady D. is very grateful to the lady

　　( ) 50.What is the best title for the passage?

　　A. An Unwilling Student B. How to Enjoy Your Life?

　　C. Attitude is Everything D. A Peaceful Night

　　C

　　Photosynthesis(光合作用) appears when a tree uses the sunlight and chlorophyll(叶绿素) to make glucose(葡萄糖). The tree needs to eat the glucose to grow, and we know it is eating because the leaves are turning green. It is not the glucose but chlorophyll that turns the leaves green.

　　Trees grow the most in spring and summer, when there is a lot of sunshine every day. When fall begins, days grow shorter and there is less sun. That makes trees begin getting ready for winter. Leaves begin to turn red, orange, gold, and brown, because with less sunlight and water for photosynthesis, the green chlorophyll begins to disappear.

　　The leaf colors we see in autumn have been in leaves all along, but with so much chlorophyll, we can’t see them until the chlorophyll is gone. As winter comes, the tree uses the food it has stored during spring and summer, and goes into a rest period (时期). Actually, trees hibernate just like bears! The only difference is that bears lie down in a cave to sleep, and trees lose all their leaves and stand up to sleep.

　　( ) 51.Which turns leaves green?

　　A. The sunlight b. The water C. The glucose D. The chlorophyll

　　( ) 52.Why do trees grow the most in spring and summer?

　　A. Because the weather is warm. B. Because more trees are planted

　　C .Because there is a lot of rain every day. D. Because there is a lot of sunshine every day

　　( ) 53. In autumn, trees .

　　A. start to grow B. begin getting ready for winter

　　C .go into a rest period D. begin to disappear

　　( ) 54.The underlined word “hibernate” means “ “.

　　A. keep something secret B. put something in a special place

　　C .spend the winter by sleeping D. spend the winter by playing

　　( ) 55.Which of the following is TRUE about the leaf colors we see in autumn?

　　A. They grow after autumn B. They have been in leaves all long

　　C . They disappear in spring D. They can be made into glucose.