In the idiom "in good feather", we change "good" into "high, full" without changing meaning. This change of constituent is known as ______.

单项选择题Three British soldiers were killed in ______.

单项选择题Simonyi helped design both Microsoft Word and Excel programs before leaving to form his own company in ______.

单项选择题The main idea of the passage is that the United States Presidents should ______

单项选择题Where does the Horatio Nelson the naval captain who defeated Napoleon at the battle of Trafalgar in 1805, and so stopped him from invading England stand

单项选择题How does the author think about Paris in the 20th Century