Problem-Solution structures are mainly found in the Results and Discussion sections.

Effective reading of the Results and Discussion section involves identifying its structure and extracting relevant information. Read the following statements, and identify the information contained in these three parts, and match the statement of a, b, &c with1, 2, & 3 1. Limitations and how they were addressed 2. Key findings 3. Main results a. Consumption of black tea without milk caused nausea in three volunteers. (the 2nd sentence of Results) ———————— b. We found that severely obese subjects with a high prevalence of diabetes and the metabolic syndrome lost more weight in a six-month period on a carbohydrate-restricted diet than on a fat- and calorie-restricted diet (the 1st sentence of discussion) ———————— c. This study proves a principle and does not provide clinical guidance; given the known benefits of fat restriction, future studies evaluating long-term cardiovascular outcomes are needed before a carbohydrate-restricted diet can be endorsed (the last sentence of paragraph 7, Discussion) （填空格式：例如123）

听力原文： Clay is found almost everywhere in the world. (32) It is formed by the action of wind and water on rocks over thousands of years. The rocks change in both chemical and physical ways. Chemically, elements are added and taken away. Physically, the rocks break down into smaller and smaller pieces. After a long time, some of the rock changes to clay. (33) Clay is important because it is used around the world to make containers of all kinds. Potters add water to soften the clay. This makes it easier to form. into shapes by hand or by machine. Then it is fired in an extremely hot stove. The result is a container with a hard surface that will last for many years. You can usually find good clay (34) in low areas of islands or land, especially if volcanoes helped form. the land. (34) Clay often exists in fields covered with some water. The clay will be found about one meter below the ground. (34) River banks often also have clay about one meter or less under the surface. You can recognize clay (35) because it is very shiny when it is wet. You can also perform. a test. Take some of the material and add enough water to it to make it seem like you are making bread. Then press it in your hand until it is about the size of an egg. It is probably clay if it holds together instead of falling apart when you stop pressing.

(33)

A．The natural force makes it come into being.

B．It originates from some chemical elements in the nature.

C．It comes from the rocks with the action of wind and water.

D．A series of biological changes happen in the process.

听力原文： All the rescuers found in the mountains of the Sierra de Perija in Venezuela was the scattered wreckage of the plane and the charred corpses of its occupants. There were no survivors. The plane not only lost both of its engines—a fact revealed from its last radio messages--but the aircraft exploded on impact, producing a fireball that was seen kilometers away. The aircraft's black box has been found and will be analyzed by experts from Venezuela, who have sent their own investigators to look into the tragedy. West Caribbean Airways is now under the microscope. The company lost another aircraft in March this year in a crash that killed eight people. The airline is in severe financial difficulties and even before this disaster had been told to tighten up its maintenance program by the Colombian Aviation Authority. The company's promised to suspend flights until preliminary investigations are completed.

Which one of the following is NOT true according to the accident?

A．All the passengers were dead.

B．Both of the plane's engines got lost.

C．The aircraft exploded and caught fire.

D．The black box has not been found yet.

听力原文： All the rescuers found in the mountains of the Sierra de Perija in Venezuela was the scattered wreckage of the plane and the charred corpses of its occupants. There were no survivors. The plane not only lost both of its engines—a fact revealed from its last radio messages—but the aircraft exploded on impact, producing a fireball that was seen kilometers away. The aircraft's black box has been found and will be analyzed by experts from Venezuela, who have sent their own investigators to look into the tragedy. West Caribbean Airways is now under the microscope. The company lost another aircraft in March this year in a crash that killed eight people. The airline is in severe financial difficulties and even before this disaster had been told to tighten up its maintenance program by the Colombian Aviation Authority. The company's promised to suspend flights until preliminary investigations are completed.

Which one of the following is NOT true according to the accident?

A．All the passengers were dead.

B．Both of the plane's engines' got lost.

C．The aircraft exploded arid caught fire.

D．The black box has not been found yet.

The news of the first successful cloning of a sheep has sent shock waves around the world．As a result, in many countries, officials and even some scientists are calling for new or strengthened legislation to outlaw human cloning, although at this early date, no concrete measures have been proposed．In the United States, which currently has no law prohibiting the procedure, President Clinton announced an urgent inquiry into the potential ethical and legal implications bythe National Bioethics Advisory Commission, which will report its conclusions by the end of May. Meanwhile, Clinton has banned federal funding for human cloning research and asked for a moratorium on nonfederally funded efforts. In addition, both houses of the U. S. Congress had held holding hearings on the issue. Scientists have cloned embryos for the first time from patients with serious diseases and injuries. It is believed that the day will come when some of mankind's most destructive diseases and injuries can be effectively treated through the use of therapeutic stem cells.