North America borders both the North ______ and the North ______.

单项选择题The word strand (the first sentence in the second paragraph) is closest in meaning to the word ______.

单项选择题The author advocates that women ______.

单项选择题The solidarity-with-housewives strand of feminist thought (the first sentence in the fourth paragraph) refers to ______.

单项选择题The second concern seems to be contradictory to the first one in that it argues ______.

单项选择题According to the author, distinctions between those engaged in the creative arts and in natural sciences can in part be explained by ______.