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Chinese poetry and philosophy have exerted great influence over ______.
单项选择题______ is considered to be the best-known English dramatist since Shakespeare, and his representative works are plays inspired by social criticism.
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.