温馨提示：手机用户请点击下方“原网页”或“电脑版”进行查看本文，效果最佳！
B
Parents should stop blaming themselves because there’s not a lot they can do about it. I mean the teenager problem. Whatever you do or however you choose to deal with it, at certain times a wonderful, reasonable and helpful child will turn into a terrible animal.
I've seen friends deal with it in all kinds of different ways. One strict mother insisted that her son, right from a child, should stand up whenever anyone entered the room, open doors and shake hands like a gentleman. I saw him last week when I called round. Sprawling (懒散地躺))himself on the sofa in full length, he made no attempt to turn off the loud TV he was watching as I walked in, and his greeting was no more than a quick glance at me. His mother was ashamed. “I don’t know what to do with him these days,” she said. “He’s forgotten all the manners we taught him.” He hasn’t forgotten them. He’s just decided that he’s not going to use them. She confessed (坦白 ) that she would like to come up behind him and throw him down from the sofa onto the floor.
Another good friend of mine let her two daughters climb all over the furniture, reach across the table, stare at me and say, “I don’t like your dress; it’s ugly. ” One of the daughters has recently been driven out of school. The other has left home.
“Where did we go wrong?” Her parents are now very sad. Probably nowhere much. At least, no more than the rest of that unfortunate race, parents.
25. This passage is most probably written by_________.
A. a specialist in teenager studies B. a headmaster of a middle school
C. a parent with teenage children D. a doctor for mental health problems
26. The underlined word “it” in the second paragraph refers to________.
A. the change from good to bad that's seen in a child
B. the way that parents often blame themselves
C. the opinion that a child has of his parents
D. the advice that parents want their children to follow
27. From the second example we can infer that the parents of the two daughters _________.
A. pay no attention to them B. are too busy to look after them
C. have come to hate them D. feel helpless to do much about them
28. What is the author’s opinion about the sudden change in teenage children?
A. Parents have no choice but to try to accept it.

B. Parents should pay still more attention to the change.
C. Parents should work more closely with school teachers.
D. Parents are at fault for the change in their children.
C
Life in the Clear
Transparent animals let light pass through their bodies the same way light passes through a window. These animals typically live between the surface of the ocean and a depth of about 3,300 feet—as far as most light can reach. Most of them are extremely delicate and can be damaged by a simple touch. Sonke Johnsen, a scientist in biology, says, “These animals live through their life alone. They never touch anything unless they’re eating it, or unless something is eating them.” 
And they are as clear as glass. How does an animal become see-through? It’s trickier than you might think.
The objects around you are visible because they interact with light. Light typically travels in a straight line. But some materials slow and scatter(散射) light, bouncing it away from its original path. Others absorb light, stopping it dead in its tracks. Both scattering and absorption make an object look different from other objects around it, so you can see it easily.
But a transparent object doesn’t absorb or scatter light, at least not very much, Light can pass through it without bending or stopping. That means a transparent object doesn’t look very different from the surrounding air or water. You don’t see it—you see the things behind it. 
To become transparent, an animal needs to keep its body from absorbing or scattering light. Living materials can stop light because they contain pigments(色素) that absorb specific colors of light. But a transparent animal doesn’t have pigments, so its tissues won’t absorb light. According to Johnsen, avoiding absorption is actually easy. The real challenge is preventing light from scattering.
Animals are built of many different materials—skin, fat, and more—and light moves through each at a different speed. Every time light moves into a material with a new speed, it bends and scatters. Transparent animals use different tricks to fight scattering. Some animals are simply very small or extremely flat. Without much tissue to scatter light, it is easier to be see—through. Others build a large, clear mass of non-living jelly-lie(果冻状的) material and spread themselves over it .
Larger transparent animals have the biggest challenge, because they have to make all the different tissues in their bodies slow down light exactly as much as water does. They need to look uniform. But how they’re doing it is still unknown. One thing is clear for these larger animals, staying transparent is an active process. When they die, they turn a non-transparent milky white.
29.According to Paragraph 1, transparent animals _______.
A. stay in groups B. can be easily damaged
C. appear only in deep ocean D. are beautiful creatures
30.The underlined word “dead” in Paragraph 3 means __________.
A. silently B. gradually C. regularly D. completely
31.One way for an animal to become transparent is to ________.
A. change the direction of light travel B. gather materials to scatter light
C. avoid the absorption of light D. grow bigger to stop light
32.The last paragraph tells us that larger transparent animals ________.
A. move more slowly in deep water
B. stay see-through even after death
C. produce more tissues for their survival
D. take effective action to reduce light spreading
  高考英语模拟试题库  http://www.17xuexiba.com/yy/