A proven method for effective textbook reading is the SQ3R method developed by Francis Robinson. The first is to survey (the S step) the chapter by reading the title, introduction, section headings, summary., and by studying any graphs, tables, illustrations or charts. The purpose of this step is to get an overview of the chapter so that you will know before you read what it will be about.  In the second step (the Q step), for each section you ask yourself questions such as "What do I already know about this topic?" and "What do I want to know?" In this step you also take the section heading and turn it into a question. This step gives you a purpose for reading the section. The third step (the first of the 3 R's) is to read to find the answers to your questions. Then at the end of each section, before going on to the next section, you recite ( the second of the 3 R's) the answers to the questions that formed in the question step. When you recite you should say the information you want to learn out loud in your own words. The fifth step is done after you have completed step 2, 3 and 4 for each section. You review (the last of the 3 R's) the entire chapter. The review is done much as the survey was in the first step. As you review, hold a mental conversation with yourself as you recite the information you selected as important to learn. The mental conversation could take the form of asking and answering the questions formed the headings or reading the summary, which lists the main ideas in the chapter, and trying to fill in the details for each main idea. The SQ3R method consists of steps  _  . A) three B) four C) five D) seven
C


Many students are planning field trips as spring draws near. Fourteen-year-old Zhou Liqun is busy digging holes along rivers. The girl and her "One Piece of Paper Team" are planting trees to improve the environment.  They collect waste paper to sell for trees and have set up websites to spread the message of connections between humans and nature. "We want to make environmental protection everyone's habit," says the girl. "Even a piece of paper matters."  Eager to join Zhou in such meaningful work? Now you are offered advice on what to do. Last month, measures for public participation in environmental protection were published by the State Environmental protection Administration  . The special measures are expected to change the light rain of the past into a storm of environmental protection.  Last year's Songhua River pollution acted as an alarm to Chinese people. According to SEPA officials, environmental pollution has become serious, and will continue so for the next 15 years.   A recent survey showed that though most Chinese people care about environmental problems, they don't put their concerns into practice. One reason is that they don't know how. So the newly published measures present information about how to report environmental problems and how to join in the battle against pollution.  Actually there is much you can do in daily life. Buy less to reduce waste. Don't throw away things before you have made the most use of them. Use electricity, water and gas only when necessary. Switch them off when you don't need them.  Everyone can participate in making the planet suitable for future generations. Why not join in and make our world more fantastic? What is the writer's purpose of writing the passage? A) To praise Zhou Liqun and her friends. B) To remind us that our world is heavily polluted. C) To give us advice on how to make environmental protection everyone's habit. D) To call on people to join in the fight against the environmental pollution.
D


When you choose a freezer, remember it's probably going to be with you for a long time. So it's important to know which freezer is right for your needs.    First, decide if you want an upright or chest model. Uprights are more convenient. Their storage space is more accessible and they take up less floor area. However, chest models are more energy-efficient because less cold air escapes when they are open.    If you are buying an upright, you'll have to choose between frostless  or manual  defrost . Chest freezers are always manual. Frostless freezers automatically defrost at present intervals  and remove the water. Manual models must be defrosted by hand every few months or whenever frost pile up to about a quarter of an inch.    To help your freezer reach a ripe old age, try to find a spot that's cool, dry, and away fromdrafts . Drafts and heat will raise the freezer's cabinet temperature, which makes it work harder to keep cool. That means wasted energy. That means wasted energy and a shortened life.    Dry air is important because highhumidity  can cause the freezer to rust outside and frost up inside. With proper care, a freezer can serve you for 15 years or more. Regular cleaning and simple maintenance will help it maintain a zero-degree temperature and keep it smelling fresh and looking almost new.    Frostless models requires less care than manual defrost freezers. The inside of a frostless unit should be washed periodically with warm water and baking soda or a mild soap, rinse, and dried.   Good habits go a long way toward a freezer that runs efficiently. To get the most from your freezer, check regularly to make sure it's providing a true zero-degree temperature.   Keep the freezer at least three-quarters full. The emptier it get, the more energy is wasted. If more than three pounds of food per cubic foot of storage space is added every 24 hours, the resulting high or low temperature can damage the food. According to the passage, choosing the best place for your freezer means  _  . A) putting it in an unheated garage if possible B) locating it near a stove if it is a manual-defrosted model C) trying to keep it away from heat, drafts, and humidity D) locating it as close as possible to the kitchen door

C