Read the following article and select the best answer. Article: Botany , the study of plants, occupies a particular position in the history of human knowledge.For many thousands of years it was the one field of awareness about which humans had anything more than the vaguest ) of insights.It is impossible to know today just what our Stone Age ancestors knew about plants, but from what we can observe of pre-industrial societies that still exist, a detailed learning of plants and their properties must be extremely ancient.This is logical.Plants are the basis of the food pyramid for all living things even for other plants.They have always been enormously important to the welfare of people not only for food but also for clothing, tools, medicines, shelter, and a great many other purposes.Tribes living today in the jungle of the Amazon recognize hundreds of plants and know many properties of each.To them, botany has no name and is probably not even recognized as a special branch of "knowledge" at all. Unfortunately, the more industrialized we become, the farther away we move from direct contact with plants, and the less distinct our knowledge grows.Yet everyone comes unconsciously on an amazing amount of botanical knowledge, and few people will fail to recognize a rose or an apple.When nor Neolithic ancestors, living in the Middle East about 10,000 years ago, discovered that certain grasses could be harvested and their seeds planted for richer fields the next season--the first, great step in a new association of plants and humans was taken.Grains were discovered and from them flowed the wonder of agriculture: cultivated crops.From then on, humans would increasingly take their living from the controlled production of a few plants, rather than getting a little here and a little there from many varieties that grew wild, and the accumulated knowledge of tens of thousands of years of experience with plants in the wild would begin to fade away. Question: According to the passage, general knowledge of botany begun to fade away because _ . - people no longer value plants as a useful resource - direct contact with a variety of plants has decreased - botany is not recognized as a special branch of science - research is unable to keep up with the increasing number of plants
direct contact with a variety of plants has decreased

Read the following article and select the best answer. Article: Spider webs are one of the most fascinating examples of animal architecture. The most beautiful and structurally ordered are the round webs. The main function of the web is to stop and hold flying insects,long enough for the spider to catch them. In order to do so,the threads of the web have to stand the forces from large and heavy insects as well as environmental forces from wind and rain for at least a day in most cases. The round web is found to have two main characteristics. The first is its geometry,which consists of an outer frame and a central part from which threads radiate outward. Enclosed in the frame are capture spirals winding round and round from the web center out to the frame. The whole web is in tension and held in place by anchor threads,which connect the frame to the surrounding plants or objects. The second and perhaps most important characteristic is the material with which it is built. Spider silk is a kind of natural material that gives this lightweight fiber a strength comparable to that of steel, while at the same time making it very elastic . Two types of silk threads are used in the web. One is highly elastic and can stretch to almost twice its original length before breaking and, for most types of spiders, is covered in glue. This type is used in the capture spiral for catching and holding insects. The other is stiffer and stronger,and is used for the radius,frames and anchor threads,which allows the web to stand forces and to keep its structural strength through a wide range of environmental conditions. Question: Which of the following is used for catching and holding insects? - The center of the web. - The capture spirals. - The anchor threads. - The radius.
The capture spirals.

Q: Read the following article and select the best answer. Article: A man came home from work late, tired, to find his 5-year-old son waiting for him at the door. "Daddy, how much money do you make each hour?" "If you must know, I make $20 each hour." "Oh," the little boy answered, with his head down. He thought for a moment, looked up and said, "Daddy, could you lend me $10?" The father was _ , "If you asked f or the money to buy a toy or some other rubbish, the go straight to your room and think about why are you so selfish !" The little boy went to his room no words and shut the door. After a short while, the father calmed down, and started to think, "Maybe he really needs to buy something and he didn't really ask for money very often." So he went to the little boy's room. "Sorry!Maybe I was too hard on your just now." said the man, "Here's $10." "Oh, thank you Daddy!" he said happily. Then the boy took out some coins. When the father found that the boy already had money, he got angry again. "Why do you want more money since you already have some?" the father shouted angrily. "Because I didn't have enough, but now I do." The little boy replied, "Daddy, I have $20 now. Can I buy one hour of your time? Please come home early tomorrow. I would like to have dinner with you. " Question: The boy wanted tobuy _ with twenty dollars. - a new novel forhimself - a nice present for his father - a toy for his own birthday - one hour of his father's time
A: one hour of his father's time