单项选择题The U. S. Constitution requires that the president should be a _______ year-old native born American citizen, living in the States for 14 years.
单项选择题In the word unpredictable , pre- is a ______.
单项选择题______ approach the same linguistic unit from different perspectives.
单项选择题Since 1971 the Canadian government has adopted policy of ______, recognizing that cultural pluralism with- in a bilingual framework is the essence of the Canadian identity.
单项选择题Chinese poetry and philosophy have exerted great influence over ______.