42. Why does the speaker mention that construction wood is dried by heat?

　　-Qusetions 43-46. Listen to a teacher talk to students in her freshman English course.

　　- W: I’m sure you realize that your research papers are due in six weeks. I’ve looked at your proposed topics and made comments about them. The most frequent problem was proposing too broad a topic---remember, this is only a fifteen---page paper. As I return you topic papers. I’d like to look over the schedule which sketches out what we’ll do during the next two weeks. Today is Monday, by Friday, I want your preliminary outline. Please be sure to incorporate the suggestions I’ve made on your topics and your outlines. Next week I’ll have a conference with each of you. I’ve posted a schedule on my office door---sign your name to indicate the time you’re available for an appointment. In the conference, we'll discuss your preliminary outline. Then you can make the necessary revisions and hand in your final outline, which is due two weeks form today.

　　- Use the outline style in your textbook and remember it should be no more than two pages long. Be sure to begin with a thesis statement---that is with a precise statement of the point you intend to prove and include a conclusion. Have you got all that? Your two-page preliminary outlines are due at the end of this week and the final outlines are due after your conferences. Follow the text book style and include a thesis statement and conclusion.

　　43. What does the speaker mainly discuss?

　　44. When will conferences be held?

　　45. What is the purpose of the conference?

　　46. According to the speaker, how should the outline begin?

　　-Questions 47-50. Listen to a talk given by a tour guide at a museum.

　　- M: Before we begin our tour, I’d like to give you some background information on the painter Grant Wood---we’ll be seeing much of his work today. Wood was born in 881in Iowa country, and became interested in art very early in life. Although he studied art in both Minneapolis and at the Art Institute of Chicago, the strongest influences on his art were European. He spent time in both Germany and France and his study there helped shape his own stylized form of realism.

　　- When he returned to Iowa, Wood applied the stylistic realism he had learned in Europe to the rural life he saw around him and that he remembered from his childhood around the turn of the century. His portraits of farm families imitate the static formalism of photographs of early settlers posed in front of their homes. His paintings of farmers at work, and of their tools and animals, demonstrate a serious respect for the life of the mid-western United States. By the 1930’s, Wood was a leading figure of the school of art called “American regionalism.”

　　- In an effort to sustain a strong Mid-western artistic movement. Wood established an institute of Mid-western art in his home state. Although the institute failed, the paintings you are about to see preserve Wood’s vision of pioneer farmers.