Richard: This class is so boring. When will it end 　　Drew: I don't know. I don't think I can take it much longer. 　　Teacher: ________ 　　Richard: Oh, nothing. We were discussing the text.

单项选择题Traditionally, ________ on Thanksgiving Day in New England.

单项选择题In 1964 ________ of Henry Osaka Tanner's paintings was shown at the Smithsonian Institution.

单项选择题________ fashioned from a wick floating in a bowl of oil functioned according to the principle of capillary action.

单项选择题Classical logic is characterized by a concern for the structure and elements of argument ________ that thought, language, and reality are interrelated.

单项选择题________ that distinguish human beings from other primates are related to the ability of people to stand upright and walk on two legs.